Fault Finding Chart 3.6 - Rheem 871018 Service Instructions Manual

Fault Finding Chart 3.6

3.6
Water flow
servo
malfunction
Is error
code 65
displayed?
NO
YES
Is error
code 52
displayed?
TM031 Integrity 18, 20, 24, 26L Service Instructions REV: B
D.O.I: February 2008
This document is stored and maintained electronically by
Integrity temp
set below 46
degrees.
Integrity temp
YES set above 46
degrees.
Mechanical
bypass (models
without -B or -C
suffix in model
number)
Tests 23,
24 & 25
Is
diagnostic point 18 NO
normal?
YES
Test 25
Is the water
flow servo motor at NO
ON position?
YES
Set the hot water
temperature at 60º
and fully open a
hot water tap.
*Is
maintenance
information 5y
displaying
*5Y is the temperature of the
60?
hot water outlet thermistor
Is the
resistance of the
YES proportional gas flow
regulating valve
normal?
NO
Is
the bypass
solenoid open
circuit?
NO
Is the
PCB supplying
power to the
solenoid?
YES
Is the
voltage at connector
between H2 & H8 and H7
& H8 normal?
Isolate and
then restore
power.
After power is restored the
water flow servo motor
limiter should move to the
Is the water
flow servo motor
functional?
Test 15
YES
NO
44
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled"
Test 30
YES
Replace water body assembly.
Note: the bypass solenoid is activated only
if the set temperature is below 46 degrees.
Test 31
NO
Replace PCB assembly.
Tests 23 & 24
NO
YES
fully open position
NO Replace water body assembly.
NO
Replace PCB assembly.
Replace the proportional gas flow
regulating valve.
3.7