Paloma PH2-20R OFN, Engineering Handbook

Page: 77 / 172

SVC 820-Tankless Gas Trouble Shooting Manual Page | 77
77
65 – Error Code Diagnostic Chart
YES
NO
YES
YES
NO
While water is flowing and unit is
attempting to ignite; check DC Voltage
across White & Black Wires at
connector “C”:
8 – 16 DC VOLTS
Is the DC voltage
OK?
Attempt to operate unit again.
If the unit malfunctions due to an Error
Code 65:
Replace Control Board
Is the DC voltage
OK?
Turn power to unit OFF then ON again and turn water
flow on. Check DC Voltage across Red & Black Wires
at connector “C”:
8 – 16 DC VOLTS
Turn power to unit OFF then ON again and turn water
flow on. Check DC Voltage across Green & Black
Wires at connector “C”:
4 – 6 DC VOLTS
Attempt to operate unit again.
If the unit malfunctions due to an Error
Code 65:
Replace Control Board
Is the DC voltage
OK?
NO
Attempt to operate unit again.
If the unit malfunctions due to an Error
Code 65:
Replace Control Board
Attempt to operate unit again.
If the unit malfunctions due to an Error
Code 65:
Replace Water Control Valve