Before contacting Rinnai for service, follow the fault finding guide. If problems persist or this information doesn’t answer
your questions, contact Rinnai on the phone number on the back of this manual.
Service call outs attending to any condition or fault that is not related to Rinnai products or components may be chargeable.
CONDENSATION IN COLLECTORS
Condensation in solar
collectors
• There is a small amount of ventilation between atmosphere and the internals of the
solar collector to ensure efficient operation. Under certain weather conditions,
water vapour naturally present in the air may condense on the inside surface of the
collector glass. This does not affect the performance of the system. If you are
concerned contact Rinnai to discuss
NOISY SOLAR COLLECTORS
Noise from solar collectors
• Occasionally on days of high solar gain, the water temperature in the collector may
become very high. The noise may be similar to a boiling kettle, or an expanding
contracting metallic sound. The collector is designed to withstand these conditions,
and no action is needed, unless it is extreme. Contact Rinnai to discuss if you
have any concerns.
SOLAR PUMP CONTINUOUSLY OPERATING
Temperature sensor leads
not in place
• The system will not operate correctly if the temperature sensor leads are not
correctly positioned (dry well on storage cylinder and on solar collector outlet).
Contact your installer or Rinnai to discuss.
NO WATER FROM THE HOT TAP
Restriction in the hot tap or
failure of the cold water
supply to the heater
• Check for water flow at the other hot taps and that the cold water isolation valve is
fully open
WATER HAMMER
Hot and cold water
plumbing in the premises
• Contact your installer or a plumber to discuss checking the clipping of hot and cold
water pipe work and install a pressure limiting valve or water hammer arrestor as
required
INSUFFICIENT OR NO HOT WATER
Electric Boosted Systems:
• Often people 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 that there will be insufficient hot water.
Excessive hot water
consumption
Gas Boosted Systems:
• Insufficient flow may occur if multiple outlets are in use at the same time and
exceed the rated flow capacity of the gas booster. If so, reduce the number of
outlets in use.
• Consider discussing with your installer, fitting water saving fixtures and/or flow
control or pressure limiting valves to reduce consumption.
Incorrect solar system size
• The system may not have been adequately sized to suit the household.
Temperature and pressure
relief valve / expansion
control valve discharging
water continuously
PTR Valves & ECV Valves (if fitted)
• 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 standard 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 under ‘Regular Care’. This may dislodge any foreign matter and alleviate
the problem.
• If the valve discharges at high flows, contact your installer or Rinnai to discuss.
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