Svc 820-Tankless Gas Trouble Shooting Manual Page - Paloma PH2-20R OFN Engineering Handbook

SVC 820-Tankless Gas Trouble Shooting Manual Page | 73
52 – Error Code Diagnostic Chart
Attempt to operate unit again.
While unit is attempting to go to main
Is the DC voltage
If the unit malfunctions due to an Error
burner, check DC voltage across red wire
OK?
NO
Code 52:
#1 and black wire #2 on Connector "R":
Replace Control Board
1.5 – 14 DC VOLTS
YES
While unit is attempting to go to main burner, check
DC voltage across red and black wires at PGFR:
1.5 – 14 DC VOLTS
Replace wiring harness for Connector "R"
on Control Board
Is the DC voltage
OK?
NO
YES
Attempt to operate unit again.
If the unit malfunctions due to an Error Code 52:
Replace Gas Control Valve
73