Daikin FDMR50TVMG, Руководство по обслуживанию

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Troubleshooting for Outdoor Unit SiSG121917E
157 Part 6 Service Diagnosis
7.15 Compressor System Sensor Abnormality
Error Code
H0
Outdoor Unit LED
Display
A j 1 i 2 i 3 h 4 h 5 h
Method of Error
Detection
 The system checks the power supply voltage and the DC voltage before the compressor
starts.

The system checks the compressor current right after the compressor starts.
Error Decision
Conditions
 The power supply voltage and the DC voltage is obviously low or high.
 The compressor current does not run when the compressor starts.
Supposed
Causes
 Disconnection of reactor
 Disconnection of compressor harness
 Defective outdoor unit PCB
 Defective compressor
Troubleshooting
Connect the reactor
properly.
(R20419)
N O
YES
Connect the compressor
properly.
N O
YES
Replace the reactor.
N O
YES
Replace the compressor or
the compressor relay
harness.
Restart the operation again
and if the error occ
u rs
again, replace the o u tdoor
u nit PCB (main PCB).
N O
YES
Disconnect the reactor from the o u tdoor
u nit PCB and meas u re the resistance
v al u e b et w een reactor terminals w ith
m u ltimeter.
Disconnect the compressor relay harness
from the o
u tdoor u nit PCB and meas u re
the resistance v al u e b et w een the each 3
terminals of the compressor w ith
m u ltimeter.
Caution
Be s u re to t u rn off the po w er s w itch b efore connecting or disconnecting
connectors, or parts may b e damaged.
Check the reactor.
Check the compressor.
T u rn off the po w er.
Connection OK?
Connection OK?
10
Ω
or less?
Check the connection of the
reactor.
Check the connection of the
compressor.
10
Ω
or less
b et w een each terminal?