Troubleshooting - Rinnai Pro Series Operation Manual

Troubleshooting

Check the following information before making a service call as some performance characteristics
are a normal part of operation. If you are still unsure or concerned after reading this section, please
contact Rinnai on 0800 746 624.
Issue
Unit does not turn on when
pressing the On/Off button
Unit changes from cool/heat
mode to fan mode
Indoor unit emits a white
mist
Indoor and outdoor units
emit a white mist
Noisy indoor unit
Noisy indoor and outdoor
unit
Noisy outdoor unit
Dust is emitted from indoor
or outdoor unit
Unusual smell
Outdoor unit fan does not
operate
Operation is erratic or unit is
unresponsive
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Possible causes
The unit has a three minute protection feature that prevents the
unit from overloading. The unit cannot be restarted within three
minutes of being turned off. Another possible cause could be a
faulty remote, or the remote batteries need changing.
The unit may change its setting to prevent frost from forming
on the unit. Once the temperature increases, the unit will start
operating in the previously selected mode again.
The set temperature has been reached, at which point the unit
turns off the compressor. The unit will continue operating when the
temperature fluctuates again.
In humid regions, a large temperature differential between the
room's air and the conditioned air can cause a white mist.
When the unit restarts in 'heat' mode after defrosting, white mist
may be emitted due to moisture generated from the defrosting
process.
A rushing sound may occur when the louvre resets its position.
A squeaking sound may occur after running the unit in 'heat' mode
due to the expansion and contraction of the unit's plastic parts.
Low hissing sound during operation. This is normal and is caused
by the refrigerant gas flowing through the indoor and outdoor
units.
Low hissing sound when the system starts, has just stopped
running, or is defrosting. This noise is normal and is caused by the
refrigerant gas stopping or changing direction.
Squeaking sound. This is normal expansion and contraction of
the plastic and metal parts of the unit due to temperature changes
during operation.
The unit will make different sounds based on its current operating
mode.
The unit may accumulate dust during extended periods of non-
use, which will be emitted when the unit is turned on. This can be
mitigated by covering the unit during long periods of inactivity.
The unit may absorb odours from the environment, such as paint,
cooking, cigarettes, etc., which will be emitted during operation
and cleaning.
During operation the fan speed is controlled to optimise operation.
Interference from cell phone towers and remote boosters may
cause the unit to malfunction. If this occurs try disconnecting the
power and then reconnecting, and pressing the on/off button on
the remote to restart operation.