Symptoms That Are Not Faults; Troubleshooting - Rinnai DONSR20Z9 Operation & Installation Manual

OPERATION
When the power switch is connected, some energy will be consumed even if the unit is not running.
Disconnect the power to save energy.
CAUTION
A degree of dirt will accumulate when the unit has been used several times, which will require cleaning.
Take of the batteries from the remote controller.
5.

SYMPTOMS THAT ARE NOT FAULTS

The following symptoms may be experienced during the normal operation of the unit and are not considered faults.
Note: If you are not sure whether a fault has occurred, contact your supplier or service engineer immediately.
Symptom 1. The unit will not run
Symptom: When the ON/OFF button on the controller is pressed, the unit does not immediately start running.
Cause: to protect certain system components, system start-up or re-start is intentionally delayed for up to 12
minutes under some operating conditions. If the OPERATION LED on the unit's panel is lighting, the system is
working normally and the unit will start after the intentional delay is complete.
Heating mode is running when the following panel lights are on: operation and the "DEF./FAN LED" indicator.
Cause: the indoor unit activates protective measures because of the low outlet temperature.
Symptom 2. Symptom 2: The unit emits white mist
White mist is generated and emitted when the unit starts to operate in a very humid environment. This phenomenon
will stop once the humidity in the room is reduced to normal levels.
The unit occasionally emits white mist when it runs in heating mode. This occurs when the system finishes periodic
defrosting. Moisture that may accumulate on the unit's heat exchanger coil during defrosting becomes mist and is
emitted from the unit.
Symptom 3. Symptom 4: Dust is emitted from the unit
This can occur when the unit first runs after a long idle period.
Symptom 4. Symptom 5: The unit gives off a strange odour
If smells such as those of strong-smelling food or tobacco smoke are present in the room, they can enter the unit,
leave trace deposits on the unit's internal components, and later be emitted from the unit.
6.

TROUBLESHOOTING

6.1 General
Sections "6.2 Unit Troubleshooting" on page 11 and "6.3 Remote Controller Troubleshooting" on page 11
describe some initial troubleshooting steps that can be taken when an error occurs. If these steps do not resolve
the issue, arrange for a professional technician to investigate the problem. Do not attempt further investigations or
troubleshooting yourself.
(a) If any of the following errors occur, power the unit off, contact a professional technician immediately and
do not attempt troubleshooting yourself:
(b) A safety device such as a fuse or circuit breaker frequently blows/trips.
(c) An object or water enters the unit.
(d) Water is leaking from the unit.
Do not attempt to inspect or repair this unit by yourself. Arrange for a qualified technician to carry out all
servicing and maintenance.
CAUTION
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