10 | Hoto hot water heat pump operation & installation 11790-C 03-12
Troubleshooting guide
Lack of hot water, or no
hot water
Is there electricity supply to the
heat pump?
Check that the heat pump is
plugged into the power point and
turned on—the compressor will
start approximately three minutes
after the power is turned back on.
Check that the isolating switch
marked ‘Hot Water’ or ‘Water
Heater’, at the meter box, is
switched on. Check also any
isolating switches installed near
the water heater are switched on.
Check the fuse or circuit breaker
marked ‘Hot Water’ or ‘Water
Heater’ at the meter box.
Repeated failure of the fuse or
tripping of the circuit breaker
indicates a fault that must be
investigated by an authorised
tradesperson.
Are you using more hot water
than you think?
Often you don’t realise how
much hot water is actually being
used, especially when showering.
Typical flow rates for showers is
around 8-10 litres per minute.
Conduct a simple experiment by
placing a measured bucket under
your shower for ten seconds
and multiply by six to obtain the
amount of water produced over a
minute.
If your result is significantly more
than the rates above, you may
want to consider installing flow
restrictors. These are available at
all good plumbing outlets.
Cold water relief valve
discharging continuously?
It is normal for the cold water
relief valve to discharge a small
quantity of water through the
drain line while the heat pump
is operating to heat the water. If
water is discharging continuously
when the heat pump is not
operating, there may be a fault
with one of the valves—contact
your installer to discuss.
High electricity bills
If you think your electricity bill is
too high, check:
- The electricity tariff on your
last bill, has this changed from
previous bills?
- If the cold water relief valve is
discharging continuously.
- Water usage, has this
increased (guests, winter etc.)
- Temperature probe/sensor is
installed as per instructions on
page 15.
