Rheem 70103 - Fault Finding Chart 1.1; Fault Finding Chart 1.1 a

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TM063 701, 702 & 703 Series Boiling Water Unit Service Instructions
Revision D: Feb 2017
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”
Fault Finding Chart 1.1
1.1
Is reading below
1 mega-ohm?
NO
YES Replace BW element.
Is reading below
1 mega-ohm?
Replace inlet solenoid.YES
NO
Is control board
shorting on backing
plate?
Check for pinched or damaged
wiring touching the water heater
chassis.
Refix control board to insulated
stand-offs.
YES
NO
Electrical Insulation Test
Disconnect BW element
wire from control board and
megger between disconnected
wIre and earth.
Disconnect inlet solenoid
wiring and megger between
each inlet solenoid terminal
and earth.
YES
Fault Finding Chart 1.1a (703 Series with no proxy controller)
Is BW element
resistance ok?
(TEST 6A )
NO
YES
Boiling water
heating fault
Is BW element
wiring ok?
NO
Replace control board.YES
1.2
Has BW ECO
tripped?
(TEST 5)
YES
Does BW ECO
trip again?
(TEST 5)
2
YES
ECO reset. Fault rectified.NO
NO
Repair faulty wiring.
Replace boiling water element.
Reset boiling water ECO and
check appliance operation. If
ECO cannot be reset replace
boiling water element.
(TEST 5A & 5B)
(TEST 5A & 5B)