Paloma PH2-20R DVSN, Инженерный справочник

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SVC 820-Tankless Gas Trouble Shooting Manual Page | 41
41
CONTROL BOARD Diagnostic Chart
NO
NO
NO
NO
NO
YES
Measure DC voltage across black wire #6
and yellow wire #1 on connector “K”:
90 – 120 DC Volts
Is the voltage
OK?
Measure DC voltage across black wire #6
and red wire #5 on connector “K”:
90 – 120 DC Volts
Measure DC voltage across black wire #6
and blue wire #4 on connector “K”:
90 – 120 DC Volts
Measure DC voltage across black wire #6
and white wire #2 on connector “K”:
90 – 120 DC Volts
Measure DC voltage across black wire #6
and grey wire #3 on connector “K”:
90 – 120 DC Volts
Is the voltage
OK?
YES
YES
Is the voltage
OK?
YES
Is the voltage
OK?
YES
Is the voltage
OK?
Control Board is ‘OK’
IF all components tested ‘OK’:
**CHECK GAS, VENTING, & GROUND**
All voltage checks must be performed while unit is attempting to go to main burner and Molex connector “K” IS
connected to Control Board. Restart unit after each voltage check.
Replace Control Board
Replace PCB
Replace Control Board
Replace Control Board
Replace Control Board