Rheem 310 Series Service Instructions Manual page 45

Fault Finding – Chart 8 - 8.3
8 8.1
Fit pressure gauges
to high and low side
of refrigerant system.
TM025 Rheem Heat Pump Service Instructions REV: B
Date of Issue: 02/08/07
This document is stored and maintained electronically by
Refrigeration system fault finding
8.2 8.3
Fit pressure gauge
to high side of
refrigerant system.
Test 19
Is the
head pressure
excessive?
YES
Allow time for the
system to equalise.
Did
the system
equalise?
YES
Is the system
taking too long to
equalise?
NO
Is the
TX valve
operating?
Is the
Suction pressure
low/vacuum or
excessively
high?
NO
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
NO
NO
YES
Test 21
NO
adjustment") or replace if faulty.
YES
Test 20 Low
YES
High
High side head pressure excessive (Test 18)
44
Replace compressor.
Locate blockage in refrigerant
system and repair.
Possible restriction in system,
Locate and repair.
Possible system overcharge,
adjust refrigerant charge.
TX valve metering incorrectly,
adjust or replace TX valve.
Adjust TX valve (refer to
component replacement
procedure 23 "TX valve
System overcharged, adjust
refrigerant charge.
Locate and repair leak in
refrigerant system.