GE DHDVH52 Technical Service Manual page 45

The dryer control has a service test mode that can be utilized by the service technician in order to test
critical components and to access error codes. This test mode will help the service technician to quickly
identify failed or improperly operating dryer components.
To enter the test mode:
1. Disconnect the power for 30 seconds.
2. Reconnect power and within 30 seconds of
reconnecting power:
a. Press signal button.
b. Press delay start button.
c. Press signal button.
d. Press delay start button. (Displays t01)
Test Mode
t01 Model ID
t02 Error Codes
t03 Software ID
t04 Program Non-volatile Memory Test
t05 User Interface
t06 Keys Continuity
t07 Outlet Thermistor
t08 Inlet Thermistor
t09 Moisture Sensor
t10 Exhaust Detection
Service Test Mode
Press the power button during the test selection
mode.
Note: A dryer left in the test mode will exit the test
mode after a period of 30 minutes.
Verifi es (or sets on new board) the proper model id.
Lists up to 10 control-detected problems.
Displays the software version number and the non-
volatile memory version number.
Control computes and compares the 16-bit CRC of
the non-volatile memory with the pre-computed
version stored in the non-volatile memory.
Control turns on all LEDs and the 7-segment display.
Verifi es that all displays and buttons work.
Displays outlet thermistor temperature.
Displays inlet thermistor temperature.
Displays voltage read from the moisture sensor.
Verifi es status of the exhaust system.
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To exit the test mode:
Description
(Continued Next Page)