Rheem 310 Series Service Instructions Manual page 30

Fault Finding – Chart 3.5
System in boost or limp mode - Software version HPV 3.1, HPV 3.2 or no HPV
3.5
T4 is ambient
air sensor
Is the
temperature at
sensor T4
< 2ºC?
NO
T2 is evaporator
sensor
Is the
temperature at
sensor T2
< 2ºC?
T2 temperature can
be measured by
inserting thermometer
probe into evaporator
NO
fins next to sensor T2.
Is
the ambient air
temperature above
50ºC?
circulator water
NO
flow direction
Is the
circulator impellor
functioning?
YES
Is the
water system
blocked?
NO cold water dropper
tube fallen off?
TM025 Rheem Heat Pump Service Instructions REV: B
Date of Issue: 02/08/07
This document is stored and maintained electronically by
YES
Is the
correct?
Is there
YES an air lock in the
water system
NO
Has the
Are the
refrigeration
NO
system pressures
correct?
Service. All printed copies not bearing this statement in RED are deemed "uncontrolled".
identification
YES
Is the
ambient air
temperature <
º
5 C?
YES
YES
NO
YES
NO
YES
YES
Tests 19 & 20
YES
29
System functioning correctly and
should operate in boost mode
until temperature at T4 rises
above 2ºC at which time the heat
pump will reset and start back at
sequence 0.
3.6
NO
System functioning correctly and
should operate in boost mode
until evaporator temperature rises
above 2ºC at which time the heat
pump will reset and start back at
sequence 0.
System working ok. Ambient air
temperature too hot for normal
heat pump operation.
Reinstall circulator so flow is
directed towards heat exchanger.
Bleed air from water outlet at
flexible hose union.
Warning! Ensure water escaping
from flexible hose is caught in a
container and does not escape or
sensor strip damage may occur.
Repair or replace circulator
impellor.
Clear blockage in water system at
circulator, heat exchanger,
dropper tubes or flexible hoses.
Replace cold water dropper tube.
8.1
NO
3.7