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SAVE A SERVICE CALL
Rinnai's servicing network personnel are fully trained and equipped to give the best service on your Rinnai
appliance. If your appliance needs service, ring one of the service contact numbers on the back of this booklet.
The pressure and temperature relief valve and expansion control valve (if fitted) must be replaced by an authorised
person at intervals not exceeding 5 years or more frequently in areas where the water is classified as scaling water.
If the power supply cord to the heat pump unit is damaged, they must be replaced by an authorised person in order
to avoid a hazard.
Use the following guide to avoid the need for an unnecessary service call.
INSUFFICIENT OR NO HOT WATER
Heat Pump Unit Not Powered
Excessive hot water consumption
Pressure & Temperature Relief (PTR) Valve
continually discharging water
Expansion Control Valve (ECV) continually
discharging water
Ambient conditions too hot
Ambient conditions too cold
Rinnai
Check to ensure the electric isolating switch at the
switchboard (usually marked "Hot water" or "Water
heater" is turned on. (note that the compressor will not
start up for 2 minutes after power is turned on).
Often end users are surprised at the amount of hot water
used, especially when showering. If the amount of hot
water used during the day exceeds the storage capacity
of the cylinder, it is likely there will be insufficient hot
water.
It is normal and desirable that this valve allows a small
quantity of water to be discharged during the heating
cycle. If it discharges more than a bucket of water during
a 24 hour period or discharges continuously there may
be another problem.
If the valve dribbles continuously, try easing the valve
gear for a few seconds as described in the section
'Excessive Discharge from Safety Devices' on page
8. This may dislodge any foreign matter and alleviate
the problem.
If the valve discharges at high flows, especially at night,
it may be as a result of the water pressure exceeding the
design pressure of the water heater. Ask your installer to
fit a Pressure Limiting Valve (PLV).
It is normal and desirable that this valve allows a small
quantity of water to be discharged during the heating
cycle. If it discharges more than a bucket of water during
a 24 hour period or discharges continuously there may
be another problem.
If the valve leaks continuously, try easing the valve gear
for a few seconds as described in the section 'Excessive
Discharge from Safety Devices' on page 8. This may
dislodge any foreign matter and alleviate the problem. If
this does not alleviate the problem contact Rinnai.
To protect the components of the heat pump unit it may
not operate when the ambient temperature is higher than
45°C. The heating element will operate if water heating
is required, but may take longer to heat the water.
To protect the components of the heat pump unit it may
not operate when the ambient temperature is less than
-1°C. The heating element will operate if water heating is
required, but may take longer to heat the water.
10
EHPS Heat Pump OIM - Issue 1
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