Uf-00" - Wiring And Piping Mismatch; Others - Daikin 2MXM50M Service Manual

ESIE16-02B | Part 2. Troubleshooting
Possible cause
Improper combination of indoor unit and
outdoor unit.
Wiring abnormality between indoor unit
and outdoor unit.
Faulty outdoor unit main PCB.
Faulty indoor unit main PCB.
More info:
Check procedures
"Main PCB" on page 53
2.2.3.6. "UF-00" – Wiring and piping mismatch
Trigger
When the interunit wiring between indoor
and outdoor unit is incorrect.
Piping abnormality.
Possible cause
Faulty wiring between indoor and outdoor
unit.
Refrigerant shortage (incorrect
charge/leakage).
Refrigerant circuit is clogged.
More info:
Check procedures
"Wiring diagram" on page 98

2.2.4. Others

Not applicable.
4/04/17 | Version 1.1
RA R32 Split & multi split M-Series
Check
Check combination.
Check wiring between indoor unit and out-
door unit.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the indoor main PCB receives
power.
Replacing procedures
"Replacing main PCB" on page 84
Effect
Unit will stop operating.
Check
Check wiring between indoor and outdoor
unit.
Check for refrigerant shortage.
Perform a leak test.
Check for possible blockage (Blockages
can be checked by measuring the refriger-
ant/pipe temperature. Sudden drop in
temperature could indicate a blockage.
(Remark: This is not valid for the expan-
sion valve.)).
Replacing procedures
2.2. Error based troubleshooting
Corrective action
Adjust installation when required.
Adjust wiring between indoor unit and out-
door unit when required.
Replace wiring between indoor unit and
outdoor unit when required.
Restore the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Restore the power to the indoor main
PCB.
Replace indoor main PCB when HAP LED
is not blinking in regular intervals.
Reset
Automatic reset.
Corrective action
Correct wiring.
If required, repair the leak and charge the
correct amount of refrigerant.
Page 41