Rheem 874W27NF Service Manual page 17

F
13 S.V. 2 (SV2) on
12 S.V. 1 (SV1) on
9 P.G.F.R Valve on
14 Flame Detected? NO
3 seconds later
Leakage >
YES
than 0.1uA
I.U.I on
Igniter off
Gas rate change-over
done by solenoid valves
Proportional temperature
adjustment
Hot water volume adjustment
Set temp.
3
46ºC or lower?
NO
YES
Solenoid bypass valve on Solenoid bypass valve off
NO
Heat exchange
outlet temp too
low?
YES
05 Flashing
NO
Low rate
combustion?
YES
10 Flashing
NO
Safety device
working?
YES
This document is stored and maintained electronically by
Operational Flow Chart 2
F1
A
Igniter off
S.V. 3 (SV3) off
S.V. 2 (SV2) off
S.V. 1 (SV1) off
G.I.S.V (SVO) off
P.G.F.R Valve off
First ignition
YES
trial?
S.V. 1 (SV1) off
S.V. 2 (SV2) off
NO
S.V. 3 (SV3) off
P.G.F.R Valve off
11 Flashing
Igniter off
I.U.I. Off
E
G.I.S.V (SVO) off
S.V. 1 (SV1) off
S.V. 2 (SV2) off
S.V. 3 (SV3) off
P.G.F.R Valve off
YES
11 Flashing
12 Flashing
NO
First Ignition
Trial?
15 Flashing 31 Flashing
I.U.I. Off
Outlet water
Water inlet
temp exceeded
thermistor
97ºC for more
Ignition Flame
disconnected
than 15 seconds
Failure Failure
16 Flashing 71 Flashing 76 Flashing 61 Flashing
Communication
Outlet water
G.I.S.V control Abnormal fan
problem between
temperature
failure remote controller
too high
and water heater
32 Flashing 33 Flashing 34 Flashing
Heat
Outlet Ambient air
exchanger
thermistor thermistor
thermistor
disconnected disconnected
disconnected
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled"
81 Flashing 65 Flashing 52 Flashing
Malfunction of
Post purge P.G.F.R
water volume
speed failure control failure
control motor
35 Flashing 79 Flashing 14 Flashing
Fan motor
Thermistor
current
connections O.H.L failure
detection
crossed
failure
66 Flashing
Malfunction of
water bypass
control motor
99 Flashing
Abnormal
combustion
29 Flashing
Heat
Exchange
outlet temp too
low