11 Troubleshooting
Installer reference guide
22
RXF50+60B2_RXF71A2_RXP50~71L2_(A)RXM42~71N2_RXJ50N2_
RXA42+50B2
R32 split series
4P513661-6B – 2018.05
10.2
Maintenance safety precautions
DANGER: RISK OF ELECTROCUTION
DANGER: RISK OF BURNING
NOTICE: Risk of electrostatic discharge
Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.
WARNING
▪ Before carrying out any maintenance or repair activity,
ALWAYS switch off the circuit breaker on the supply
panel, remove the fuses or open the protection devices
of the unit.
▪ Do NOT touch live parts for 10 minutes after the power
supply is turned off because of high voltage risk.
▪ Please note that some sections of the electric
component box are hot.
▪ Make sure you do NOT touch a conductive section.
▪ Do NOT rinse the unit. This may cause electric shocks
or fire.
10.3
Checklist for yearly maintenance
of the outdoor unit
Check the following at least once a year:
▪ 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
Corrective action
The indoor units are not installed
securely
Install the indoor units securely.
11.3.2
Symptom: The unit is NOT heating or
cooling as expected
Possible causes
Corrective action
Wrong connection of the
electrical wires
Connect the electrical wires
correctly.
Gas leakage
Check for gas leakage.
11.3.3
Symptom: Water leakage
Possible causes
Corrective action
Incomplete thermal insulation
(gas and liquid piping, indoor
portions of the drain hose
extension)
Make sure the thermal insulation
of the piping and the drain hose
is complete.
Improperly connected drainage
Secure the drainage.
11.3.4
Symptom: Electrical leakage
Possible causes
Corrective action
The unit is NOT earthed correctly Check and correct the
connection of the earth wiring.
11.3.5
Symptom: Unit does NOT function or burn
damage
Possible causes
Corrective action
The wiring was NOT performed
in accordance with the
specifications
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.
