TM081 Rheem 834 Series Hydroelectric CFGWH Service Instructions
REV: AA Issued: 22/02/17
This document is stored and maintained electronically by Rheem Technical Support. All printed copies are deemed uncontrolled.
26
Fault Finding Chart
– Red LED 5 Flash Indication
Red LED 5 Flash
Hot water outlet temperature
sensor abnormal
Are all wiring plugs
and wiring connectors
firmly connected?
YES
NO
Firmly connect wiring
connector(s) and/or plug(s).
Is hot water outlet
temperature sensor
ok? (TEST 1)
YES
NO
Replace hot water outlet
temperature sensor.
Replace temperature controller.
Fault Finding Chart
– Red LED 6 Flash Indication
Red LED 6 Flash
Main burner circuit
abnormal
Are burner min and
max gas pressure
settings correctly
adjusted?
Refer to ‘Checking & Adjusting Burner Gas
Pressure’ in the ‘Component Adjustment
Procedures &
Checks’ section.
NO
YES
YES
This fault will occur if a 15°C temp rise is not detected by the hot water outlet temp
sensor within 45 ~ 180 seconds from main gas valve (SV2 & SV3) energisation
(actual time is flow rate dependent).
This fault can take up to 225 seconds to occur
from when a hot tap is opened.
Are all wiring plugs
and wiring connectors
firmly connected?
YES
NO
Firmly connect wiring
connector(s) and/or plug(s).
Fully open gas isolation valve.
NO
Is inlet gas pressure
within specification?
YES
Advise customer that inlet gas
pressure is not within
specification.
NO
Refer to ‘Checking Inlet Gas Pressure’
in the ‘Component Adjustment
Procedures &
Checks’ section.
NG: 1.13 ~ 3.5 kPa
LPG: 2.75 ~ 3.5 kPa
NO
Is heater the correct
gas type for the
premises gas supply?
YES
Refer to ‘DIP Switch Adjustments’
in the ‘Component Adjustment
Procedures &
Checks’ section.
Are temp controller
DIP switches 1 ~ 6 in
the correct position?
NO
Replace heater with a heater of
the correct gas type.
Is hot water outlet
temp sensor ok?
(TEST 1)
Replace hot water outlet
temperature sensor.
NO
YES
Are main burner
injectors correct size
for gas type?
NO
Are burner injectors
dirty or partially
blocked?
YES
Clean or replace burner
injectors.
YES
Clean or replace burner.
NO
1.4
Replace main burner injectors
with injectors of the correct size.
E
nsure DIP switches 1, 2 and
3 are in the OFF position
and
ensure DIP switches 4, 5 and 6
are in the correct position
according to heater model and
gas type
.
Is gas isolation valve
fully open?
YES
