24
PCB ERROR CODES
The water heater has a self diagnosc funcon for safety and convenience when troubleshoong.
If there is a problem with the installaon or the unit, it will display a numerical error code on the remote
controller or blink the LED on the PCB. Consult the following chart for cause for each error code.
1 2 3 4 5 6 7 8
The LED on the PCB will blink.
When remote controller is not installed
The PCB is located at the boom le-hand side of the cabinet and the error codes can be read from the LED
on the PCB or the Remote Control Temperature Display if ed.
The LED on the PCB
Error Code on Remote
Controller
Symptom
Burning LED:1 Blink
03 Incorrect Dipswitch Seng ( Gas )
70 Proporonal valve / computer
Burning LED:2 Blinks
31 Output Thermistor
32 Inlet Thermistor
39 Air-fuel Rao Rod Failure
Burning LED:3 Blinks
11 Ignion Failure
12 Flame Loss
51
Abnormal Main Gas valve or
Gas solenoid Valve
72 False Flame Detecon
99 Imperfect combuson
Burning LED:4 Blinks
61 Abnormal Outside Pump
Burning LED:5 Blinks
10 Warning for 991 Error Seng
74
Remote controller (MC100-AU3-TP)
75
Remote controllers
(FC100-AU3-TP / SC100-AU3-TP)
Error Codes On the PCB or Temperature Remote Controllers
When remote controller is installed
The error code will be displayed on the remote
controller.