Rinnai 20
Multi Split Type AC OM
SAVE A SERVICE CALL
NOTE
The following issues are not a malfunction and in most situations will not require repairs.
If problems persist contact a local dealer or your nearest customer service centre.
Provide them with a detailed description of the unit malfunction as well as your model number.
SYMPTOM
CAUSE
Unit does not turn on when pressing ON/
OFF button.
The unit has a 3 minute protection feature that prevents the unit
from overloading. The unit cannot be restarted within three minutes
of being turned off.
Cooling and Heating Models:
If the Operation light and PRE-DEF
(Pre-heating/Defrost) indicators are lit up, the outdoor temperature
is too cold and the unit’s anti-cold wind is activated in order to
defrost the unit.
In Cooling-only Models:
If the “Fan Only” indicator is lit up, the
outdoor temperature is too cold and the unit’s anti-freeze protection
is activated in order to defrost the unit.
The unit changes from COOL mode to
FAN mode.
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 resume operation when the
temperature fluctuates again.
The indoor unit emits white mist
Condensation effect that can occur during cooling operations and is
normal. In humid regions, a large temperature difference between
the room air and the conditioned air can cause white mist.
Both the indoor and outdoor units emit
white mist.
When the unit restarts in HEAT mode after defrosting, white mist
may be emitted due to moisture generated from the defrosting
process.
The indoor unit makes noises.
A squeaking sound is heard when the system is OFF or in COOL
mode. The noise is also heard when the drain pump (optional) is in
operation.
A squeaking sound may occur after running the unit in HEAT mode
due to expansion and contraction of the unit's plastic parts.
Both the indoor unit and outdoor unit
make noises.
Low hissing sound during operation: This is normal and is caused
by refrigerant gas flowing through both 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: Normal expansion and contraction of plastic and
metal parts caused by temperature changes during operation can
cause squeaking noises.
The outdoor unit makes noises.
The unit will make different sounds based on its current operating
mode.
Dust is emitted from either the indoor or
outdoor unit.
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 emits a bad odour
The unit may absorb odours from the environment (such as
furniture, cooking, cigarettes, etc.), which may be emitted during
operation.
The unit’s filters have become mouldy and should be cleaned.
The fan of the outdoor unit does not
operate.
During operation, the fan speed is controlled to optimise
performance.
CARE & MAINTENANCE
