Precautions When Troubleshooting; Solving Problems Based On Symptoms; Symptom: Indoor Units Fall, Vibrate Or Make Noise; Symptom: The Unit Is Not Heating Or Cooling As Expected - Daikin RXM20R5V1B Installer's Reference Manual

12 Disposal

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/SCALDING
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
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
Installer reference guide
22
Corrective action
Install the indoor units securely.
Corrective action
Connect the electrical wires
correctly.
Check for gas leakage.
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.
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.
OFF 1 Supply voltage (for power saving).
2 Power supply fault.
3 Turn the power OFF and back ON, and
check the LED within approximately 3
minutes.
If the LED is OFF again, the outdoor unit
PCB is faulty.
DANGER: RISK OF ELECTROCUTION
▪ When the unit is not operating, the LEDs on the PCB
are turned off in order to save power.
▪ Even when the LEDs are off, the terminal block and the
PCB may be powered.
12 Disposal
NOTICE
Do NOT try to dismantle the system yourself: dismantling
of the system, treatment of the refrigerant, oil and other
parts MUST comply with applicable legislation. Units
MUST be treated at a specialised treatment facility for
reuse, recycling and recovery.
12.1

Overview: Disposal

Typical workflow
Disposing of the system typically consists of the following stages:
1 Pumping down the system.
2 Bringing the system to a specialized treatment facility.
INFORMATION
For more details, see the service manual.
12.2

To pump down

Example: To protect the environment, pump down when relocating
the unit or when disposing of the unit.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leak in the refrigerant
circuit:
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit. Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
ARXM25+35R5V1B RXM20~35R5V1B
R32 Split Series
4P519439-8H – 2020.07