Trouble Shooting Guide - Sanden GAUS-160FQS Owner's Manual

Trouble Shooting Guide

If you are faced with a problem in using our Hot Water Heat Pump system, please check
the following items, before seeking professional help.
Status
Small or no hot water is left in
the storage tank.
Air removing procedure from the
heat pump system may be
insufficient.
No hot water
comes out of
water tap
Filter on cold inlet connector may
be blocked.
Temperature
of hot water is
Water flow speed may be
too low
dropped due to the heat pump
piping bend, blockage or crush.
Pipes may be frozen.
Stop valve is closed.
Air absorption is not sufficient
due to a blockage on the
evaporator.
For those problems not listed in the list above, an inspection provided by a skilled engineer
is required. Please contact your local Dealer.
Caution:
Do not turn off the electricity supplied to the heat pump system even if you go away from
home and do not use hot water for a long while.
If the system is equipped with freeze protect heaters, also do not turn off the power supply
to the heaters.
Failure to do so may cause the pipes to crack, due to freezing.
Considerable Causes
Sanden Heat Pump – Owner's Manual
Page 9 of 20
Action to Take
- Stop using hot water and wait for about 1
hour
- Consider a change of the electricity
supply off-peak mode (Length of power-
supply hours may be too short for the
water heating cycle to cover the hot water
consumption)
- Open the water drain plugs on the Heat
Pump Unit to remove air from water circuit.
(Be careful for burning)
- Check the filter and remove if there is any
blockage
- Check for any piping bend or crush and
remove if any
- If frozen area is found on the piping, melt
the ice on the pipe and provide a heat
insulation
- Open the valve
-Remove the object blocking the air flow
through the evaporator
(e.g. fallen leaves, grass, snow, etc.)