Service manual

TM014 Rheem Heavy Duty Electric Service Instructions REV: A
Date of Issue: 10/7/2002
11
FAULT FINDING
1
No hot water
Is
240/415 volts
present at the terminal
block?
Warning: Terminals may be live,
Personal Protective Equipment
should be worn.
Test 1 & Test 2
Isolate power and
continue with diagnosis
procedure
YES
2
Restore power and
advise customer
Is
the isolating switch
turned off?
YES
Is the
fuse(s) blown at the
switchboard?
NO
Possible fault in building
electrical wiring, continue
with diagnosis to confirm
water heater is operational
NO
Is the
reading below 1
mega-ohm?
6
YES
NO
Using the procedure on
page 18 conduct an
electrical insulation test
YES
Test 3, 4 and 5
NO
Has
the heater
been connected
incorrectly?
i.e. Active connected to Neutral terminal
Test 1
YES
NO
Isolate power and reconnect correctly.
Follow flow chart 2 to diagnose any
damaged components