11 Troubleshooting; Overview: Troubleshooting; Precautions When Troubleshooting; Solving Problems Based On Symptoms - Daikin SkyAir RZAG35A2V1B Installer's Reference Manual

11 Troubleshooting

▪ Heat exchanger
The heat exchanger of the outdoor unit can get blocked up due to
dust, dirt, leaves, etc. It is recommended to clean the heat
exchanger yearly. A blocked heat exchanger can lead to too low
pressure or too high pressure leading to worse performance.
11 Troubleshooting
11.1

Overview: Troubleshooting

This chapter describes what you have to do in case of problems.
It contains information about solving problems based on symptoms.
Before troubleshooting
Carry out a thorough visual inspection of the unit and look for
obvious defects such as loose connections or defective wiring.
11.2

Precautions when troubleshooting

WARNING
▪ When carrying out an inspection on the switch box of
the unit, ALWAYS make sure that the unit is
disconnected from the mains. Turn off the respective
circuit breaker.
▪ When a safety device was activated, stop the unit and
find out why the safety device was activated before
resetting it. NEVER shunt safety devices or change
their values to a value other than the factory default
setting. If you are unable to find the cause of the
problem, call your dealer.
DANGER: RISK OF ELECTROCUTION
WARNING
Prevent hazards due to inadvertent resetting of the thermal
cut-out: power to this appliance MUST NOT be supplied
through an external switching device, such as a timer, or
connected to a circuit that is regularly turned ON and OFF
by the utility.
DANGER: RISK OF BURNING
11.3 Solving problems based on
symptoms
11.3.1 Symptom: Indoor units fall, vibrate or
make noise
Possible causes
The indoor units are not installed
securely
11.3.2 Symptom: The unit is NOT heating or
cooling as expected
Possible causes
Wrong connection of the
electrical wires
Gas leakage
Installer reference guide
22
Corrective action
Install the indoor units securely.
Corrective action
Connect the electrical wires
correctly.
Check for gas leakage.
11.3.3

Symptom: Water leakage

Possible causes
Incomplete thermal insulation
(gas and liquid piping, indoor
portions of the drain hose
extension)
Improperly connected drainage
11.3.4

Symptom: Electrical leakage

Possible causes
The unit is NOT earthed correctly Check and correct the
11.3.5 Symptom: Unit does NOT function or burn
damage
Possible causes
The wiring was NOT performed
in accordance with the
specifications
11.3.6 Symptom: Indoor unit is running only with
fixed fan speed, not possible to change
fan speed
Possible causes
Indoor unit has fixed fan speed in
cooling mode when outdoor
ambient temperature drops
below -10°C.
11.3.7 Symptom: Unit goes to defrost operation
even when the heat exchanger is not
frozen
Possible causes
It is normal behaviour related to
reliability of the system.
11.4 Fault diagnosis using LED on
outdoor unit PCB
LED is... Diagnosis
flashing Normal.
▪ Check the indoor unit.
ON ▪ Turn the power OFF and back ON, and
check the LED within approximately 3
minutes.
If the LED is ON again, the outdoor unit
PCB is faulty.
Corrective action
Make sure the thermal insulation
of the piping and the drain hose
is complete.
Secure the drainage.
Corrective action
connection of the earth wiring.
Corrective action
Correct the wiring.
Corrective action
It is normal behaviour. All fan
speeds will become available
when outdoor ambient
temperature rises again.
Corrective action
In case the piping length is
<30 m and the level difference
between the indoor and the
outdoor unit is <20 m, you can
turn off this function by cutting
the jumper J6 on the outdoor unit
PCB. The main power supply
MUST be turned off when cutting
the jumper.
RZAG35~60A2V1B
R32 split series
4P540076-1A – 2018.11