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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
Status
Small or no hot water is left in
Little or no hot water is left in the
the storage tank.
storage tank.
Air removing procedure from the
Air removing procedure from
heat pump system may be
N o h o t w a t e r
the heat pump system may be
insufficient.
comes out of
insuf昀椀cient.
No hot water
water tap
comes out of
Water pressure may be low due
water tap
Temperature of
to the heat pump piping bent,
Filter on cold inlet connector may
hot water is too
blocked or crushed.
be blocked.
Temperature
low
of hot water is
Water flow speed may be
too low
dropped due to the heat pump
Pipes may be frozen.
piping bend, blockage or crush.
Pipes may be frozen.
Stop valve is closed.
Air absorption is not suf昀椀cient due
to a blockage on the evaporator.
Stop valve is closed.
Air absorption is not sufficient
due to a blockage on the
For those problems not listed in the list above, an inspection provided by a licensed plumber
evaporator.
is required. Please contact your local Dealer.
Caution:
For those problems not listed in the list above, an inspection provided by a skilled engineer
is required. Please contact your local Dealer.
Do not turn off the electricity supplied to the heat pump system even if you are 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
Caution:
Do not turn off the electricity supplied to the heat pump system even if you go away from
to the heaters.
Failure to do so may cause the pipes to crack, due to freezing.
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
Considerable Causes
Sanden Heat Pump – Owner's Manual
Page 9 of 20
Sanden Heat Pump - Owner
Page 9 of 20
Action to Take
Action to Take
- Stop using hot water and wait for about 1
- Stop using hot water and wait for about 1
hour
hour
- Consider a change of the electricity
- Consider a change of the electricity
supply off-peak mode (Length of power-
supply off-peak mode (Length of power-
supply hours may be too short for the
supply hours may be too short for the
water heating cycle to cover the hot water
water heating cycle to cover the hot water
consumption)
consumption)
- Open the water drain plugs on the Heat
- Open the water drain plugs on the Heat
Pump Unit to remove air from water circuit.
Pump Unit to remove air from water circuit.
(Be careful for burning)
(NB: High hot water temperature)
- Check for any physical damage and make
- Check the filter and remove if there is any
good.
blockage
- Check for any piping bend or crush and
- If frozen area is found on the piping, melt
remove if any
the ice on the pipe and provide a heat
insulation
- If frozen area is found on the piping, melt
- Open the valve
the ice on the pipe and provide a heat
insulation
- Remove the object blocking the air flow
through the evaporator
- Open the valve
(e.g. fallen leaves, grass, snow, etc.)
-Remove the object blocking the air flow
through the evaporator
(e.g. fallen leaves, grass, snow, etc.)
'
s Manual
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