Specifications
TM002 Integrity 18 & 20L Service Instructions REV: E
D.O.I: 7/11/2007
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
22
F F1
G.I.S.V (SVO) on
11 Flashing
First
ignition
trial?
11
Operational Flow Chart 2
Igniter on
P.G.F.R Valve off
12
S.V.1 (SV1) on
S.V. 2 (SV2) on
0.1 seconds later
13
14
P.G.F.R Valve on10
G.I.S.V (SVO) off
Igniter off
P.G.F.R Valve off
S.V. 2 (SV2) off
S.V. 1 (SV1) off
C.I. Off
Flame
Detected?
Leakage >
than 0.1uA
NO
3 seconds later
NO
P.G.F.R Valve off
YES
G.I.S.V (SVO) off
S.V. 1 (SV1) off
S.V. 2 (SV2) off
Igniter off
C.I. on
[on] displayed
Igniter off
YES
Proportional temperature
adjustment
Gas rate change-over
done by solenoid valves
Hot water volume
adjustment
Set
temp. 46 degrees
or lower?
16
Solenoid bypass
valve off
YES
NO
Low rate
combustion?
10 Flashing
YES
3
19
79 Flashing 14 Flashing 31 Flashing 32 Flashing 33 Flashing 34 Flashing 35 Flashing 11 Flashing 12 Flashing 56 Flashing
99 Flashing16 Flashing 71 Flashing 76 Flashing 61 Flashing 81 Flashing 65 Flashing 52 Flashing
Safety
device
working?
NO
NO
Z
Fan motor
current
detection
failure
YES
O.H.L failure
Outlet water
temp exceeded
97 degrees for
more than 15
seconds
15 Flashing
Water inlet
thermistor
disconnected
Outlet water
temperature
too high
Malfunction of
water by-pass
solenoid valve.
Abnormal
combustion
Heat
exchanger
thermistor
disconnected
Flame Failure
Cross light
failure
Thermistor
connections
crossed
Ambient air
thermistor
disconnected
Outlet
thermistor
disconnected
G.I.S.V control
failure
Communication
problem between
remote controller
and water heater
Abnormal fan
speed
Post purge
failure
Malfunction of
water volume
control motor
P.G.F.R
control failure
*Mechanical bypass
models
871018-B / 875018-B
871020-B / 875020-B
& *solenoid bypass
models
Solenoid bypass
valve on
*For models without a -B suffix e.g. 871020NF compare
appliance to wiring diagram to determine whether it has
a mechanical or solenoid operated bypass
Note: see page 20 for details on interpreting chart abbreviations.