Specifications

TM022 Raypak RHP 33 Pool and Spa Heat Pump Service Instructions REV C
D.O.I: 14/03/2006
31
This document is stored and maintained electronically by Service. All printed copies not bearing this statement in RED are deemed “uncontrolled”.
Fault Finding Chart 7
7
Electrical insulation test
Replace compressor
Disconnect the wiring to the
compressor and megger
between each compressor
wire and earth
Is the
reading below
1 mega-ohm?
YES
Disconnect the wiring to the
fan motor and megger between
each fan motor wire and earth
NO
Is the
reading below
1 mega-ohm?
Replace fan motor
Disconnect the wiring to the
transformer and megger
between each transformer
wire and earth
NO
YES
Note: Ensure secondary windings are
disconnected before meggering.
DO NOT MEGGER SECONDARY (24v)
SIDE OF TRANSFORMER
Is the
reading below
1 mega-ohm?
Replace transformer
Check for pinched or
damaged wiring touching the
water heater chassis
YES
NO
Electrical Insulation Testing
There are two basic test procedures that should be carried out when the operation and
function of a water heater’s electrical system containing electronic equipment is in doubt.
Personal Protective Equipment should be worn when conducting step 1 of
this procedure to reduce the risk of electric shock. Refer to Rheem safety
procedure on electrical testing.
The Heat Pump electrical system contains electronic equipment that may be
damaged by megger operation. Ensure that the Active and Neutral wires are
bridged (short circuited) together when conducting Test No 2.
Test No.2
To check insulation resistance of the pool/spa heater active and neutral circuit.
(Reading not to be below 1 mega-ohm).
1. Isolate power to the water heater by removing fuse. Confirm with multi-meter
across Line 1 and Line 2 terminals of the compressor contactor that voltage is
not present.