Service Test 101 - Defrost Heater - Fisher & Paykel RX256DT4X1 FP Service Manual

• Error Code 6
• This error code indicates a shorted freezer thermistor. Service test 142 can be helpful to
determine the state of freezer thermistor (refer to Section 8.1.4.7 for troubleshooting). This
failure may be caused by a bad wiring harness or defective thermistor (refer to thermistor
chart in Section 8.1.13).
• Error Code 7
• This error code indicates an open ambient thermistor. Service test 143 can be helpful to
determine the state of ambient thermistor (refer to Section 8.1.4.7 for troubleshooting). This
failure indicates a defective main board (refer to thermistor chart in Section 8.1.13).
• Error Code 8
• This error code indicates a shorted ambient thermistor. Service test 143 can be helpful to
determine the state of ambient thermistor (refer to Section 8.1.4.8 for troubleshooting). This
failure indicates a defective main board (refer to thermistor chart in Section 8.1.13).
• Error Code 9
• This error indicates an evaporator fan failure because of high output voltage (refer to Section
8.1.4.4 for troubleshooting). Possible defective Main Control Boards.
• Error Code 10
• This error indicates an evaporator fan failure because of low output voltage (refer to Section
9.2.5 for troubleshooting). Possible defective main control board.
• Error Code 11
• This error indicates a defrost circuit failure. The test detected a closed defrost terminator.
Service test 101 can be helpful to determine the state of the defrost terminator (refer to
Section 8.1.4.2 for troubleshooting). The unit may have a defective wiring harness.
• Error Code 12
• This failure occurs when the system fails to run the Power Up test. Possible defective main
control board.
8.1.4.2

Service Test 101 - Defrost Heater.

When selected, this test will display the state of the defrost thermostat.
observation and measurement of proper defrost function. The service technician must observe defrost
heat and voltages while the test is activated.
•
When the test is activated, the refrigerator display will show the status of the defrost relay.
Normally, the defrost relay is not energized.
• The Refrigerator Temperature Up/Down keypad
defrost relay.
• When the defrost relay is activated, the refrigerator display will show the status of the defrost
terminator.
DEFROST RELAY IS OPEN
/
37
This test also allows
can be used to activate and deactivate the
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