Home appliances error codes and causes and Solution - KitchenAid

KitchenAid Home appliances: Error Code Causes and Solutions - 2 Digit 

F0

Causes

Control Board Failure

Solution

Replace control board (clock).

F1

Causes

Control Board Failure

Solution

Replace control board (clock).

F2

Causes

Oven Temperature Is Too High

Solution

Check for welded contacts on bake and broil relays. If present, replace control board (clock). For SELF CLEAN models, check door lock operation. Check sensor, sensor harness, and the sensor harness connection at sensor and oven control. Also check for any causes of high resistance in the oven temperature sensor circuit. Remember: The oven control board (clock) measures resistance of sensor circuit, not actual oven temperature.

F3

Causes

Open Oven Temperature Sensor (RTD)

Solution

Replace oven temperature sensor (RTD).

F4

Causes

Shorted Oven Temperature Sensor (RTD)

Solution

Replace oven temperature sensor (RTD).

F5

Causes

Control Board Failure

Solution

Replace control board (clock).

F7

Causes

Function Key Stuck

Solution

Replace control board (clock).

F8

Causes

Control Board Failure

Solution

Replace control board (clock).

F9

Causes

Oven Door Lock Failure

Solution

Check door lock switches and wiring. Check for stuck lock switch.

KitchenAid Built-In Microwave Oven Fault Codes

F1-E3 / F1-E4

Causes

Control Board Failure

Solution

Replace control board (clock).

F2-E0 / F2-E1

Causes

Touch Pad (Keypad) Not Connected

Solution

Check connection between touch pad and control board (clock).

F2-E3

Causes

Touch Pad (Keypad) Shorted or Key Held Down Too Long

Solution

Select 'cancel' and observe for 60 seconds. If error reappears, replace touch pad, or touch and pad and control board (clock) if all one assembly.

KitchenAid Cooktop Fault Codes 

F03

Causes

One or More Eyes Permanently Pressed

Solution

Clean glass surface and remove all objects placed on it. If failure remains, disconnect power for one minute. If error still remains after power has been restored, replace touch control module. (control board)

F12

Causes

Electronic Board and Touch Module Communication Error

Solution

Disconnect power for one minute and check to see if error reappears once power has been restored. If error continues, replace board connection cable between touch control module and electronic control. If error continues, replace electronic control (control board) and if error still persists, replace the touch module (touch pad).

F13

Causes

Internal CPU checksum Error(s)

Solution

Disconnect power for one minute and check to see if error reappears once power has been restore. It error continues, replace touch control module.

F22  

Causes

Key Sensitivity Problem

Solution

Disconnect power for one minute and check to see if error reappears once power has been restore. If error continues, replace touch control module.

F36

Causes

Temperature Probe Hardware Error

Solution

Disconnect power for one minute and check to see if error reappears once power has been restore. If error continues, replace touch control module.

KitchenAid Cooktop Fault Codes 

F03

Causes

One or More Eyes Permanently Pressed

Solution

Clean glass surface and remove all objects placed on it. If failure remains, disconnect power for one minute. If error still remains after power has been restored, replace touch control module. (control board)

F12

Causes

Electronic Board and Touch Module Communication Error

Solution

Disconnect power for one minute and check to see if error reappears once power has been restored. If error continues, replace board connection cable between touch control module and electronic control. If error continues, replace electronic control (control board) and if error still persists, replace the touch module (touch pad).

F13

Causes

Internal CPU checksum Error(s)

Solution

Disconnect power for one minute and check to see if error reappears once power has been restore. It error continues, replace touch control module.

F22

Causes

Key Sensitivity Problem

Solution

Disconnect power for one minute and check to see if error reappears once power has been restore. If error continues, replace touch control module.

F36

Causes

Temperature Probe Hardware Error

Solution

Disconnect power for one minute and check to see if error reappears once power has been restore. If error continues, replace touch control module.

KitchenAid Front Loading Automatic Washer Fault Codes

FH

Causes

Detects No Water Entering Machine or No Pressure Switch Trip

Solution

Select 'cancel' twice to clear this code. If there is NO water in the unit, make sure the valves are turned on all the way. Check for plugged or kinked inlet hoses, as well as plugged screens in the inlet valves. Verify that the inlet valve is operational. If there is water in the unit, verify the drain pump is working and the pressure switch hose is in good condition and properly connected. Make sure there is not a siphon problem and check all hoses for possible leaks. Unplug the unit and disconnect the power to check all wire harness connections to the inlet valve, pressure switch, drain pump, flow meter, and Central Control Unit (CCU). Reconnect the unit and power to verify the pressure switch is operational, as well as the flow meter (blow air through the flow meter and measure resistance). Check CCU is also operational by performing a diagnostic test or any cycle. Replace failed component.

F02

Causes

Long Drain (Drain Exceeds 8 Minutes)

Solution

Select 'cancel' twice to clear error code. Note: You may see a "SUD" error code appear first during this failure. This should change to the F02 error code after a few minutes. Proceed by checking the drain hoses for proper connection and kinks. Unplug unit and disconnect power. Check the electrical connections at the pump and make sure it is operational with no debris or blockage. Reconnect power and plug unit in. If problem has not been corrected, replace the pump.

F05

Causes

Water Temperature Sensor Error

Solution

Unplug and disconnect power to the unit and check connections to the water temperature sensor. Check resistance of heating element if present in model, for abnormal reading (infinity). Replace failed component.

F06

Causes

Drive Motor Tachometer Error (Unable to Detect Motor Speed)

Solution

Check the shipping system including shipping bolts, spacers, and cables are removed and unplug unit and disconnect power. Check wire harness connections between drive motor and Motor Control Unit (MCU), and between MCU and the Central Control Unit (CCU). Reconnect power and plug unit in. Check the MCU by looking for operations of the drive motor, and check drive motor for powered rotations. Replace failed component. Note: If this failure occurs during high-speed spin, the door will be unlocked after three minutes.

F07

Causes

Motor Control Unit (MCU) Error

Solution

Unplug unit and disconnect power to check wire harness connections between drive motor and MCU, and between MCU and Central Control Unit (CCU). Reconnect power and plug unit in. Check the MCU by looking for operations of the drive motor, and check drive motor for powered rotations. Note: If this failure occurs during high-speed spin, the door will be unlocked after three minutes.

F09

Causes

Overflow Condition (Pressure Switch Closed Too Long)

Solution

Check to make sure drain hose is not plugged or kinked and unplug the unit and disconnect power. Check wire harness connections to pressure switch, drain pump, and Central Control Unit (CCU). Check for drain pump failure and clean it of any debris. Check the inlet valve and pressure switch for proper shut off and operation. Replace failed component. Note: If this error occurs, the door will remain locked and the drain pump will run constantly even if 'cancel' is selected. Turn off hot and cold water to faucets and unplug the unit before proceeding.

F10

Causes

Motor Control Unit (MCU) Heat Kink Thermal Trip (Too Hot)

Solution

Check for proper installation and ventilation, and make sure unit is not located near a heat source. Disconnect power and unplug the unit to check wire harness connections to the motor, MCU, and Central Control Unit (CCU). Check the drive system for any worn or failed components and reconnect power and plug unit in. Check MCU by looking for operations of the drive motor and check drive motor for powered rotations. Replace failed component.

F11

Causes

Serial Communication Error Between MCU and CCU

Solution

Disconnect power and unplug unit. Check wire harness connections to the motor, Motor Control Unit (MCU), and Central Control Unit (CCU). Check the drive system for any worm or failed components and reconnect power and plug unit in. Verify CCU is working by performing diagnostic test or any cycle. Check MCU by looking for operations of the drive motor and check drive motor for powered rotations. Make sure the serial harness at the MCU is not mounted upside down. The wires should be to the left when facing the MCU connectors. Replace failed component.

F13

Causes

Dispenser Circuit Error

Solution

Disconnect power and unplug unit to check mechanical linkage from dispenser motor to top of dispenser. Check wire harness connections to the Central Control Unit (CCU) and the dispenser motor. Check dispenser motor for powered rotations. Replace failed component.

F14

Causes

EEPROM Error

Solution

Disconnect power and unplug unit. Verify Central Control Unit (CCU) is operating properly by running a diagnostic test or any cycle. Replace is defective. Note: A power glitch may cause this error.

F15

Causes

Motor Control Unit (MCU) Error

Solution

Disconnect power and unplug unit to check wire harness connections to the motor, MCU, and Central Control Unit (CCU). Check the drive belt and reconnect power and plug unit in. Check the MCU by looking for operations of the drive motor and check the drive motor for powered rotations. Replace failed component.

F21 / F22

Causes

Central Control Unit (CCU) / Touch Pad / LED Assembly Error

Solution

Check that the touch pad/LED assembly is working by selecting different cycles and changing the modifiers and options to see if it is responding. Disconnect power and unplug unit to check wire harness connections to the CCU and the touch pad/LED assembly. Replace failed component.

FdU

Causes

Door Unlock Error

Solution

It is possible the door lock mechanism is broken or the door switch/lock unit has failed. Check the door switch/lock for any debris or foreign objects. Disconnect power and unplug unit to check wire harness connections to the Central Control Unit (CCU) and the door switch/lock unit. Note: Unit will attempt to unlock itself during this error six times before displaying this error code. To manually unlock the unit, unplug the power cord from the outlet and remove the toe panel. Reach up along the inside of the front panel and locate the bottom of the door latch assembly, where there should be a tear-drop shaped tab. Gently pull the tab down approximately 1/4 inch or until a 'click' is heard. The door should now be unlocked.

FdL

Causes

Door Lock Error

Solution

It is possible the door lock mechanism is broken or removed, or the door switch/lock unit has failed. Disconnect power and unplug unit to check door switch/lock unit. Check the wire harness connections to the Central Control Unit (CCU) and the door switch/lock unit. Note: Unit will attempt to lock itself during this error six times before displaying the error code.

SUD

Causes

Suds Lock (Too Much Detergent Detected)

Solution

Make sure drain hose is not plugged or kinked and disconnect power and unplug unit. Check wire harness connections to pressure switch, drain pump, and Central Control Unit (CCU). Make sure the drain pump is free from debris or foreign objects and then reconnect power and plug unit in. Check drain pump and pressure switch and verify CCU operation by running a diagnostic test or any cycle. Note: This error may signify a bad pump, an extra heavy load, excessive detergent, or excessive suds. If too much detergent was used, run the unit through a Rinse/Spin cycle, and then run a Normal cycle without adding detergent.

KitchenAid Front Loading Gas and Electric Dryer Fault Codes

PF

Causes

Power Failure

Solution

PF error code indicates a power failure during the dryer's cycle. Press and HOLD start to continue the cycle, or press off/pause to clear display.

E1

Causes

Open Thermistor

Solution

Replace thermistor.

E2

Causes

Shorted Thermistor

Solution

Replace thermistor.

E3

Causes

User Interface or Software Mismatch

Solution

If this error code appears, there is a user interface or software mismatch. It is also possible that the electronic control board or console electronics has failed. Replace failed component. Note: This error code will ONLY appears in the diagnostic test mode.

KitchenAid Pro Line Front Loading Automatic Washer Fault Codes

FH

Causes

Detects No Water Entering Machine or No Pressure Switch Trip

Solution

Select 'cancel' twice to clear this code. If there is NO water in the unit, make sure the valves are turned on all the way. Check for plugged or kinked inlet hoses, as well as plugged screens in the inlet valves. Verify that the inlet valve is operational. If there is water in the unit, verify the drain pump is working and the pressure switch hose is in good condition and properly connected. Make sure there is not a siphon problem and check all hoses for possible leaks. Unplug the unit and disconnect the power to check all wire harness connections to the inlet valve, pressure switch, drain pump, flow meter, and Central Control Unit (CCU). Reconnect the unit and power to verify the flow meter is operational by blowing air through the flow meter and measuring the resistance. Check CCU is also operational by performing a diagnostic test or any cycle. Replace failed component.

F02

Causes

Long Drain (Drain Exceeds 8 Minutes)

Solution

Select 'cancel' twice to clear error code. Note: You may see a "SUD" error code appear first during this failure. This should change to the F02 error code after a few minutes. Proceed by checking the drain hoses for proper connection and kinks. Unplug unit and disconnect power. Check the electrical connections at the pump and make sure it is operational with no debris or blockage. Reconnect power and plug unit in. If problem has not been corrected, replace the pump.

F05

Causes

Water Temperature Sensor Error

Solution

Unplug and disconnect power to the unit and check connections to the water temperature sensor. Check resistance of heating element if present in model, for abnormal reading (infinity). Replace failed component.

F06

Causes

Drive Motore Tachometer Error (Unable to Detect Motor Speed)

Solution

Check the shipping system including shipping bolts, spacers, and cables are removed and unplug unit and disconnect power. Check wire harness connections between drive motor and Motor Control Unit (MCU), and between MCU and the Central Control Unit (CCU). Reconnect power and plug unit in. Check the MCU by looking for operations of the drive motor, and check drive motor for powered rotations. Replace failed component. Note: If this failure occurs during high-speed spin, the door will be unlocked after three minutes.

F07

Causes

Motor Control Unit (MCU) Error

Solution

Unplug unit and disconnect power to check wire harness connections between drive motor and MCU, and between MCU and Central Control Unit (CCU). Reconnect power and plug unit in. Check the MCU by looking for operations of the drive motor, and check drive motor for powered rotations. Note: If this failure occurs during high-speed spin, the door will be unlocked after three minutes.

F09

Causes

Overflow Condition (Pressure Switch Closed Too Long)

Solution

Check to make sure drain hose is not plugged or kinked and unplug the unit and disconnect power. Check wire harness connections to pressure switch, drain pump, and Central Control Unit (CCU). Check for drain pump failure and clean it of any debris. Check the inlet valve and pressure switch for proper shut off and operation. Replace failed component. Note: If this error occurs, the door will remain locked and the drain pump will run constantly even if 'cancel' is selected. Turn off hot and cold water to faucets and unplug the unit before proceeding.

F10

Causes

Motor Control Unit (MCU) Heat Sink Thermal Trip (Too Hot)

Solution

Check for proper installation and ventilation, and make sure unit is not located near a heat source. Disconnect power and unplug the unit to check wire harness connections to the motor, MCU, and Central Control Unit (CCU). Check the drive system for any worn or failed components and reconnect power and plug unit in. Check MCU by looking for operations of the drive motor and check drive motor for powered rotations. Replace failed component.

F11

Causes

Serial Communication Error between MCU and CCU

Solution

Disconnect power and unplug unit. Check wire harness connections to the motor, Motor Control Unit (MCU), and Central Control Unit (CCU). Check the drive system for any worm or failed components and reconnect power and plug unit in. Verify CCU is working by performing diagnostic test or any cycle. Check MCU by looking for operations of the drive motor and check drive motor for powered rotations. Make sure the serial harness at the MCU is not mounted upside down. The wires should be to the left when facing the MCU connectors. Replace failed component.

F13

Causes

Dispenser Circuit Error

Solution

Disconnect power and unplug unit to check mechanical linkage from dispenser motor to top of dispenser. Check wire harness connections to the Central Control Unit (CCU) and the dispenser motor. Check dispenser motor for powered rotations. Replace failed component.

F14

Causes

EEPROM Error

Solution

Disconnect power and unplug unit. Verify Central Control Unit (CCU) is operating properly by running a diagnostic test or any cycle. Replace is defective. Note: A power glitch may cause this error.

F15

Causes

Motor Control Unit (MCU) Error
Solution

Disconnect power and unplug unit to check wire harness connections to the motor, MCU, and Central Control Unit (CCU). Check the drive belt and reconnect power and plug unit in. Check the MCU by looking for operations of the drive motor and check the drive motor for powered rotations. Replace failed component.

F21 / F22

Causes

Central Control Unit (CCU)/ Touch Pad / LEd Assembly Error

Solution

Check that the touch pad/LED assembly is working by selecting different cycles and changing the modifiers and options to see if it is responding. Disconnect power and unplug unit to check wire harness connections to the CCU and the touch pad/LED assembly. Replace failed component.

F32

Causes

Pressure Switch Failure

Solution

Select 'cancel' twice to clear error code and disconnect power and unplug unit. Check that the pressure switch is operational and replace if defective.

F33

Causes

System Leak

Solution

Select 'cancel' twice to clear error code. Check for any cracks or holes in the washer tub or pressure switch hose. Replace if damaged.

FdU

Causes

Door Unlock Error

Solution

It is possible the door lock mechanism is broken or the door switch/lock unit has failed. Check the door switch/lock for any debris or foreign objects. Disconnect power and unplug unit to check wire harness connections to the Central Control Unit (CCU) and the door switch/lock unit. Note: Unit will attempt to unlock itself during this error six times before displaying this error code. To manually unlock the unit, unplug the power cord from the outlet and remove the toe panel. Reach up along the inside of the front panel and locate the bottom of the door latch assembly, where there should be a tear-drop shaped tab. Gently pull the tab down approximately 1/4 inch or until a 'click' is heard. The door should now be unlocked.

FdL

Causes

Door Lock Error

Solution

It is possible the door lock mechanism is broken or removed, or the door switch/lock unit has failed. Disconnect power and unplug unit to check door switch/lock unit. Check the wire harness connections to the Central Control Unit (CCU) and the door switch/lock unit. Note: Unit will attempt to lock itself during this error six times before displaying the error code.

SUD

Causes

Suds Lock (Too Much Detergent Detected

Solution

Make sure drain hose is not plugged or kinked and disconnect power and unplug unit. Check wire harness connections to pressure switch, drain pump, and Central Control Unit (CCU). Make sure the drain pump is free from debris or foreign objects and then reconnect power and plug unit in. Check drain pump and pressure switch and verify CCU operation by running a diagnostic test or any cycle. Note: This error may signify a bad pump, an extra heavy load, excessive detergent, or excessive suds. If too much detergent was used, run the unit through a Rinse/Spin cycle, and then run a Normal cycle without adding detergent.

KitchenAid Pro Line Front Loading Gas and Electric Dryer Fault Codes

PF

Causes

Power Failure

Solution

PF error code indicates a power failure during the dryer's cycle. Press and HOLD start to continue the cycle, or press off/pause to clear display.

E1

Causes

Open Temperature Sensor

Solution

Replace temperature sensor.

E2

Causes

Shorted Temperature Sensor

Solution

Replace temperature sensor.

E3

Causes

Blower Rotation Failure

Solution

If blower rotational speed drops below 500 rpms during a cycle, all outputs a will be turned off and this error code will appear.

E4

Causes

Tumbler Rotation Failure

Solution

If tumbler rotation speed drops to 0 during a cycle, all outputs will be turned off and this error code will appear.

E5

Causes

Dry Rack Sensor

Solution

If the signal is lost during a Dry Rack cycle, all outputs will be turned off and this error code will appear.

E6

Causes

Exhaust High Limit Fault

Solution

If exhaust temperature rises above 87.7 degrees Celcius (190 degrees Fahrenheit), all outputs will be turned off and this error code will appear.

Error Code Causes and solutions - 4 Digit 

F1-E0

Causes

EEPROM Communication Error

Solution

Disconnect power for at least 30 seconds and then reconnect. Allow at least a minute after power has been restored and if error code reappears, replace control board (clock).

F1-E1

Causes

EEPROM Checksum Error

Solution

Disconnect power for at least 30 seconds and then reconnect. Allow at least a minute after power has been restored and if error code reappears, replace control board (clock).

F1-E2

Causes

UL A/D Error(s)

Solution

 Disconnect power for at least 30 seconds and then reconnect. Allow at least a minute after power has been restored and if error code reappears, replace control board (clock).

F1-E4

Causes

Model Id Error  

Solution

Disconnect power for at least 30 seconds and then reconnect. Allow at least a minute after power has been restored and if error code reappears, replace control board (clock).

F1-E5

Causes

Calibration Shifted

Solution

Disconnect power for at least 30 seconds and then reconnect. Allow at least a minute after power has been restored and if error code reappears, replace control board (clock).

F1-E6

Causes

Latch Signal Mismatch Error  

Solution

Disconnect power for at least 30 seconds and then reconnect. Allow at least a minute after power has been restored and if error code reappears, replace control board (clock).

F1-E9

Causes

Stack Overflow

Solution

Disconnect power for at least 30 seconds and then reconnect. Allow at least a minute after power has been restored and if error code reappears, replace control board (clock).

F1-E3

Causes

Wiring Harness Cavity Size Does Not Match Stored Value

Solution

Check the jumpers in the harness to make sure they agree with the actual oven size.

F2-E0

Causes

Shorted Touch Pad (Keypad)

Solution

Check the connection between the touch pad (keypad) and control board (clock) to make sure it is secure. Select the 'cancel' function and wait 60 seconds. If error code reappears then replace the touch pad, or touch pad and control board (clock) if all one assembly.

F2-E1

Causes

Touch Pad Cable Unplugged

Solution

Check the connection between the touch pad (keypad) and control board (clock) to make sure it is secure. Select the 'cancel' function and wait 60 seconds. If error code reappears then replace the touch pad, or touch pad and control board (clock) if all one assembly.

F2-E5

Causes

Cancel Key Line Open

Solution

Check the connection between the touch pad (keypad) and control board (clock) to make sure it is secure. Select the 'cancel' function and wait 60 seconds. If error code reappears then replace the touch pad, or touch pad and control board (clock) if all one assembly.

F2-E6

Causes

Cancel Key Line Open

Solution

Check the connection between the touch pad (keypad) and control board (clock) to make sure it is secure. Select the 'cancel' function and wait 60 seconds. If error code reappears then replace the touch pad, or touch pad and control board (clock) if all one assembly. All F3-E Codes - Oven Temperature Sensor (RTD) or Warming Drawer Defect - Replace oven temperature sensor (RTD).

F4-E1

Causes

Meat Probe Defect

Solution

This error indicates a problem with either the probe, receptacle, or probe circuit. Check the probe for pinched wires and make sure there is no condensation or contamination on receptacle. If ok, replace probe.

All F5-E

Causes

Door Switch Defect

Solution

This occurs when the door switches do not match. If door is latched, disconnect power from unit and check wires and connections. If damage is found, replace appropriate part. If connections are not damaged, reconnect power and hold down any key until the F5 error clears. Once the F2 code appears, select 'cancel' and observe for one minute for errors. If door is NOT latched, disconnect power from unit and check wires and connections. If damage is found, replace appropriate part. If connections are not damaged, measure door switch (door open = latch open) and latch switch (unlatch = switch open) and replace either if defective. If corrections are made during any step, power should be reconnected and the unit should be tested. Press and hold any key to clear the error code and F2 code should appear. Select 'cancel' and observe for one minute for errors. If error continues, disconnect power and replace control.

F6-E0

Causes

Return Line Not Connected

Solution

This error should appear within 60 seconds after power up to appliance. Replace control board (clock).

F7-E1

Causes

Common Switch Wire Is Defective

Solution

This error occurs when common wire to latch switch and door switch is shorted. Check all connections at control board and at the latch switch and door switch. If connections are ok, then check individual switches as outlined for the F5 error code. Note: Double ovens will have two of each switch and one common wire.

How to remove and replace the mother board - Samsung Galaxy S4

MOTHER BOARD REPLACEMENT PROCEDURE 

Pry with a plastic opening tool, or your fingernail, in the divot to the left of the rear-facing camera, near the power button.

Lift the rear case by the corner nearest the divot and remove it from the phone.

Use the flat end of a spudger, or your fingernail, to press the microSD card slightly deeper into its slot until you hear a click.

After the click, release the card and it will pop out of its slot.
Remove the microSD card.
For reassembly, push the microSD card into the slot until it clicks in place.

Insert a plastic opening tool, or your finger, into the notch of the battery compartment and lift the battery upward.

Remove the battery from your phone.

Use a plastic opening tool, or your fingernail, to press the SIM card slightly deeper into its slot until you hear a click.

After the click, release the card and it will pop out of its slot.
Remove the SIM card.
During reassembly, push the SIM card into the slot until it clicks in place.

Remove the nine 4.0 mm Phillips #00 screws securing the midframe to the display assembly.

The midframe is secured to the display assembly by several plastic clips behind the chrome bezel of the midframe. The next few steps will guide you through separating the clips to free the midframe.

Starting on the volume button side of the phone, insert your plastic opening tool between the chrome bezel around the display glass and the larger chrome border piece. Look for the seam between the two.
Slide the opening tool along the seam, separating the plastic clips as you go.
Be very gentle whilst prying, and pry only enough to separate the plastic clips—there are several thin points in the midframe bezel that may crack if you bend them too much.

Continue prying around the corner of the phone.

Slide your opening tool along the seam between the midframe and display along the bottom of the device, releasing more of the plastic clips.

Again, pry around the corner, to the power button side.

Slide the opening tool along the seam.

Continue sliding the opening tool around the top of the phone, releasing the last of the clips and freeing the midframe from the display assembly.

At this point, you may want to run your plastic opening tool along the entire perimeter of the device again, to make sure you've released all of the plastic clips.

Remove the midframe from the display assembly.

Use the flat end of a spudger to disconnect the USB board connector.

Disconnect the front-facing camera cable connector.
Disconnect the earpiece speaker assembly cable connector.

Disconnect the headphone jack assembly cable connector.

Disconnect the display/digitizer cable connector.
Disconnect the antenna cable connector.

Remove the single 2.4 mm Phillips #00 screw from the motherboard assembly.

Gently remove the motherboard.

Hold the motherboard by its edges to prevent ESD damage. Be careful not to snag it on any cables as you extract it from the display assembly.

Use the flat end of a spudger to disconnect the rear-facing camera connector.

Using tweezers, or your fingers, slide the rear-facing camera out of its notch in the motherboard.

Aircommand - IBIS Rooftop caravan air-conditioner – Error codes cause and solution

BIS Rooftop caravan airconditioner

Error codes causes and solution
Error code - E1

Room sensor fault. Usually a faulty connection (plug), damaged lead or a faulty sensor itself.
Solutions

Check White plug is connected on main board. Check resistance of thermistor & cable by measuring with a multimeter. 10K ohm @25C. If open circuit or out of calibration, replace.
Error code - E2

Inside coil sensor fault: Usually a faulty connection (2 plugs) Damaged lead or faulty sensor.
Solutions

Check Yellow plug is connected on the main board. And also plug in bundled wiring near the coil.
Check resistance of thermistor & cable by measuring with a multimeter. 10K ohm @25C. If open circuit or out of calibration, replace. When replacing this thermistor, install such that cable is downward from the copper pocket on the coil.
Error code - E3

Outside coil sensor fault Usually a faulty connection (2 plugs), damaged lead or faulty sensor.
Solutions

Check Red plug on main board and extension plug in bundled wiring usually located near capillary tube coils. Check resistance of thermistor & cable by measuring with a multimeter. 10K ohm at 25C. If open circuit or out of calibration, replace.
Error code - E4

Indicates lack of refrigerant, or the compressor is not running, or the thermistor is out of calibration.Solutions

Check that the compressor is running by listening.
If it is apparent that the compressor is running, then check the temperature difference across the evaporator. i.e. Measure temperature of return air at inlet filters and measure temp. of discharge air at grilles. This temp diff. should be 14 to 18 C. with fan on hi speed. If temp diff. is less than this, suspect lack of refrigerant.
Fit a suction gauge to access valve at rear of unit. On a 35C outside temp. then suction should be 380 to 450Kpa.

If the temp. differential is 14C or more but unit goes out on E4 after approx. 30 minutes, please check the actual thermistor temperature by the following procedure. With the inside fan running on Hi, Press Temp down button followed by the mode button. Hold them both in for approx 5 seconds. The amber Lock LED illuminates. Now press the Temp down button and the Sleep button Together for about 1 second. The green Med speed will be Flashing. The display is now reading the temp of the outside coil. Now press the Temp up button once. The Green Hi speed will be flashing. The display is now reading the temp. of the inside coil.
This temp will usually be from 5 to 12 C. If it is above 24C. It is another indication of lack of refigerant. If on the other hand the air on /air off differential is 14C or greater then suspect the thermistor itself to be out of calibration. Check the thermistor as per an E1,E2 or E3 failure by measuring its resistance.

Error code - E5

Indicates excessive temp. of the outside coil if on cooling, OR excessive temp of the inside coil in heat mode. On cooling, the E5 will appear if the outside coil temp exceeds 68 Degree C. This is an indication of condenser airflow reduced or non-existent. Using the procedure described above it is possible to watch the condenser coil temp using the Temp down button and Medium fan speed combination to display this temp. NB: if fans etc seem to be OK then measure thermistor resistance. 

Solutions

 If unit is in cooling mode, examine both condenser fans are running. If one is running then suspect a faulty motor. If both fans not running then on units up to serial No. IBSA 01175, investigate the fan speed control card located in enclosure on the LHS.
If this checks OK then investigate main control card. Units with serial No’s and onward are multi speed tapped wound motors not requiring a speed control card. If both motors inoperative then suspect main control card.
If unit is in heating mode, examine the indoor fan that it is free to rotate.
If fan is inoperative but free to rotate, then. Units up to S/N IBSA01175, examine speed control card. If OK then examine fan motor & capacitor.
Winding resistance: 

Blue /Black approx 165 Ohms

Blue / Brown approx 480ohms

If after S/N IBSA01175, check winding resistance
Blue /Black 580 ohms
Blue /Grey 630 ohms
Blue /White 685 ohms
Brown/Yellow ohms
If fan motor and capacitor check out OK then change the main control board.

Error codes E6 & E7 are not utilised in this system. If either of these codes appear, then change the main control board