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.
33
Fault Finding Chart 2
YES
Refer to fault finding chart for
the fault indication displayed.
2
NO
Do temp controller
LED’s indicate a fault
condition?
Water not hot enough
NO
Firmly connect wiring
connector(s) and/or plug(s).
NO
Refer to ‘DIP Switch Adjustments’
in the ‘Component Adjustment
Procedures &
Checks’ section.
Ensure DIP switches 1, 2 and
3 are in the OFF position,
e
nsure DIP switches 4, 5 and 6
are in the correct position
according to heater model and
gas type.
Is heater the correct
gas type for the
premises gas supply?
Are temp controller
DIP switches 1 ~ 6 in
the correct position?
Refer to ‘Checking Inlet Gas Pressure’
in the ‘Component Adjustment
Procedures &
Checks’ section.
YES
NO
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
Is gas inlet pressure
correct?
Advise customer that gas supply
pressure is not within
specifications.
NO
NG: 1.13 ~ 3.5 kPa
LPG: 2.75 ~ 3.5 kPa
Replace heater with a heater of
the correct gas type.
YES
Fully open gas isolation valve.
NO
YES
Are all wiring plugs
and wiring connectors
firmly connected?
YES
Possible faulty tempering valve
or heater may not be of
sufficient size to meet hot water
demand.
NO
Are ambient
temperatures cold
(i.e. winter)?
Set seasonal adjustment
valve to ‘Winter’ position.
YES
Is hot water
temperature
satisfactory?
Heater operating ok.
YES
Is seasonal
adjustment valve set
to ‘Winter’ position?
YES
NO
2.1
Does temp
at heater
hot water outlet
@
full water flow rate =
setpoint temp ± 2°C?
NO
(heater or gas
supply fault)
YES
(heater ok)
Note: More than one hot tap may
have to be opened to obtain full
water flow rate through the heater.
NO
1.4
Is gas isolation valve
fully open?
YES
Can setpoint
temperature be
increased?
Increase setpoint temperature
by adjusting DIP switches 7 & 8.
YES
Refer to ‘Adjusting the Setpoint
Temperature’ in the ‘Component
Adjustment Procedures &
Checks’ section.
NO
