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”
20
About the Operational Flow Charts
The Operational Flow Charts provide information on the start up sequence and, in the
event a failure occurs at any point of the start up sequence, what error code will be
displayed.
When a fault occurs, an error code and sequence number will alternate in the LED display.
The Sequence Number Table below indicates the section of the operational sequence
(boxed numbers on the operational flow chart) where the fault occurred.
Circled numbers, adjacent to the component or function, indicate the diagnostic test point
required to diagnose the fault. Refer to the table on page 25.
By locating the Error Code (displayed on the water heater or remote controller) in the
diagnosis charts the component/s or fault can be quickly identified and tested using the
diagnostic procedures outlined in this manual.
Notes and Abbreviations used on the Operational Flow Charts
P.G.F.R Valve
Proportional Gas Flow Regulating Valve
F.F
Flame Failure
G.I.S.V.
Gas Inlet solenoid Valve
I.C
Integrated Circuit
O.H.L
Over Heat Limiter
S.V. 1
Solenoid Valve 1
C.I
Combustion Indicator
S.V. 2
Solenoid Valve 2
Stepping gas rate change sequence by solenoid
Model Step 1 Step 2 Step 3
18/20L S.V. 1 ON S.V. 2 ON S.V. 1 & 2 ON
Burner Configuration (Burner Change-Over Assembly)
Model Burner 1 Burner 2
18/20L Right Solenoid (S.V. 1) Left Solenoid (S.V. 2)
Sequence Number Table
Sequence Number - 0 to -9
A0 - A9
P0 - P9
C0 - C9 E0 - E9
H0 - H9
J0 - J9
L0 - L9
U0 - U9
Operational Flow Chart Section 1 2 3 4 5
Test Equipment
A list of test equipment which will assist in conducting diagnostic procedures is provided
below. This equipment is available from Rheem Service Spare Parts Department.
Flame detection simulator WH0020080
Flame sensor current (uA) detection kit WH0020081
Fine probe adapter kit WH0020082
Heat exchanger fin brush WH0020083
Probe to alligator clip kit WH0020084