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Rinnai 10 EHPA_VMA Series 2 Heat Pump OIM
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 tted) must be replaced by an authorised
person at intervals not exceeding 5 years or more frequently in areas where the water is classied 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 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).
Excessive hot water
consumption
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 insufcient hot
water.
Pressure & Temperature
Relief (PTR) Valve continually
discharging 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 ows, 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 t a Pressure Limiting Valve (PLV).
Expansion Control Valve (ECV)
continually discharging 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 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.
Ambient conditions too hot 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.
Ambient conditions too cold 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.
NO WATER FROM THE TAP
Restriction in the hot tap or
failure of the cold water supply
to the water heater
Check for water ow at the other taps and that the cold water isolation
valve is fully open.
SAVE A SERVICE CALL
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