Maintenance And Service; Troubleshooting; Fault Diagnosis Using Led On Outdoor Unit Pcb; Disposal - Daikin RXM50A5V1B Installation Manual

11 Maintenance and service

11 Maintenance and service
NOTICE
General maintenance/inspection checklist. Next to the
maintenance instructions in this chapter, a general
maintenance/inspection checklist is also available on the
Daikin Business Portal (authentication required).
The general maintenance/inspection
complementary to the instructions in this chapter and can
be used as a guideline and reporting template during
maintenance.
NOTICE
Maintenance MUST be done by an authorised installer or
service agent.
We recommend performing maintenance at least once a
year. However, applicable legislation might require shorter
maintenance intervals.
NOTICE
Applicable legislation on fluorinated greenhouse gases
requires that the refrigerant charge of the unit is indicated
both in weight and CO
2
Formula to calculate the quantity in CO
tonnes: GWP value of the refrigerant × total refrigerant
charge [in kg] / 1000
DANGER: RISK OF ELECTROCUTION
Disconnect the power supply for more than 10 minutes,
and measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing. The
voltage MUST be less than 50 V DC before you can touch
electrical components. For the location of the terminals,
see the wiring diagram.
g
f
e
d
c
b
a Multimeter (DC voltage range)
b S80 – reversing solenoid valve lead wire
c S20 – electronic expansion valve lead wire
d S40 – thermal overload relay lead wire
e S90 – thermistor lead wire
f LED
g S70 – fan motor lead wire
Following symbols may occur on the indoor unit:
Symbol Explanation
Measure the voltage at the terminals of main circuit
capacitors or electrical components before servicing.
Installation manual
16
checklist
equivalent.
equivalent
2
DC P1+
DC N1-
a
12

Troubleshooting

12.1 Fault diagnosis using LED on
outdoor unit PCB
LED is... Diagnosis
flashing Normal.
is
▪ Check the indoor unit.
ON ▪ Turn the power OFF and back ON, and
OFF 1
2
3
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.
13

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.
INFORMATION
To protect the environment, make sure to perform an
automatic pump down operation when relocating or
dismantling the unit. For the pump down procedure, refer
to the service manual or the installer reference guide.
14

Technical data

▪ A subset of the latest technical data is available on the regional
Daikin website (publicly accessible).
▪ The full set of latest technical data is available on the Daikin
Business Portal (authentication required).
14.1

Wiring diagram

The wiring diagram is delivered with the unit, located inside of
the outdoor unit (bottom side of the top plate).
14.1.1

Unified wiring diagram legend

For applied parts and numbering, refer to the wiring diagram on the
unit. Part numbering is by Arabic numbers in ascending order for
each part and is represented in the overview below by "*" in the part
code.
check the LED within approximately 3
minutes.
If the LED is ON again, the outdoor unit
PCB is faulty.
Supply voltage (for power saving).
Power supply fault.
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.
RXM-A, ARXM-A
R32 split series
3P645642-6L – 2023.07