Error Code - Paloma PH2-20R OFN Engineering Handbook

72 | Page SVC 820 Tankless Gas Trouble Shooting Manual
52 – Error Code
Explanation: PGFR (Proportional Gas Flow Regulator) Diagnostic Checks:
malfunction. The PGFR is the only modulating valve in the •
PGFR
Gas Control Valve.
PGFR DIAGNOSTICS:
2
1
PGFR
Locate PGFR valve on lower right of unit. Remove and
Turn power OFF. Remove and reinsert connector "R"
reinsert Molex connector with red wire and Molex
on Control Board.
connector with black wire on PGFR. Attempt to
operate unit again.
3
IF 52 Error Code does NOT display,
unit had a loose connection.
IF 52 Error Code IS displayed,
continue to diagnostic chart on next
page.
Control Board
72
PGFR
Molex Connectors