Rheem 64DV - Page 45

44 | P a g e S V C 8 2 0 ( P ) P o c k e t M a n u a l
44
Gas Control Valve Diagnostics
(Igniter Rod Sparks & NO flame)
IMPORTANT: DURING VOLTAGE CHECKS – CONNECTOR KONLY
(water is flowing and unit is attempting to ignite):
IF you do NOT get a voltage reading, push and hold the MAX button on
upper right hand corner of control board to activate unit at full BTUs.
This will force voltage to ALL gas valve solenoids during diagnostics.
CAUTION: DO NOT hold MAX button down for more than 5 Seconds
*MAY CAUSE DAMAGE TO THE HEAT EXCHANGER*.
Connector Location
On Page 14
Turn Power OFF.
Remove and reinsert connectors K& R.
(Connector Kis Gas Valves.
Connector Ris PGFR valve.)
Locate PGFR valve on lower right side of unit
(round black piece on bottom of gas valve.
PGFR is a full modulating gas valve).
Remove and reinsert Molex connectors with
Red and Black wires on PGFR.
Turn Power ON.
While viewing through sight glass, operate unit to
determine IF flame is visible.
You had a loose connection.
Gas control valve is OK.
YES
Continue diagnostics on
next page.
NO
MAX
GAS VALVE
PGFR