Rheem 862 27 Series Service Instructions Manual page 34

Operational Flow Charts
Plug In
1
Power On
Initial check
normal?
Bath fill
operation
YES
B
Remote controller
switched on
On/Off lamp On
Remote controller
display on
Hot water tap open
1
Water flow
3
sensor on?
E
YES
Max & Min
buttons off?
YES
Fan On
4
Inlet
5
thermistor ok?
YES
Heat exchanger
6
thermistor ok?
YES
Outlet
7
thermistor ok?
YES
Ambient air
17
thermistor ok?
2
YES
Fan speed
4
normal?
YES
A
False flame
8
detected?
Leakage >
NO
than 0.1uA
9 P.G.F.R Valve on
10 G.I.S.V (SVO) on
11 Igniter on
P.G.F.R Valve off
18 S.V.3 (SV3) on
F
TM049 27L Continuous Flow Service Instructions
REV AL – Issued April 2019
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed "uncontrolled".
Operational Flow Chart 1
Error code cleared
NO
Functional
problem on gas
type circuit board
82 Flashing
Fan motor current G.I.S.V control
detection failure
79 Flashing
NO
YES
Input temp
> 60ºC or >
set temp?
YES
NO 24 Flashing
20 seconds later
NO 31 Flashing
NO 32 Flashing
NO 33 Flashing
NO 34 Flashing
NO 61 Flashing
5 seconds later
YES 72 Flashing
5 seconds later
Isolate Power
Communication
problem between
remote controller
and the heater
76 Flashing
Over heat limiter
failure failure
71 Flashing 14 Flashing
NO
Input temp < or =
58ºC & < or = set
NO
temp - 2ºC?
Fan On
On/Off lamp Off
Remote controller
display off
Remote controller
switched off
Fan Off
10 seconds later
2
Fan On 5
Water Flow Sensor
off
Hot water tap closed
F1
34