Daikin 10 - Page 107

104
7
Troubleshooting
5
Troubleshooting
Diagnosis Countermeasures
1
Applicable Models
AKZ**A (All series)
2
Methods of Malfunction Detection
Detect by signals from current
sensor and voltage sensor.
3
Malfunction Decision Conditions
Class Conditions
70
When current
abnormality is detected.
(Retry: 3 times)
71
When voltage
abnormality is detected.
(Retry: 3 times)
4
Supposed Causes
1Faulty compressor (M2C)
coil
1Overcurrent due to the stall
of compressor (M2C)
1Faulty power device
1Noise to power supply line
1Faulty inverter board (A2P)
Control panel display
LA
Instantaneous Overcurrent of Power Device
YES
YES
Check the alarm code in service monitor mode.
LA.71
NO
YES
LA.70
NO
The
power supply voltage
shows fluctuations such as
instantaneous power
failure.
NO
The power
supply line contains
noises.
Rectify the power
supply voltage.
Remove noises from the
power supply line.
Replace the inverter board
(A2P).
(See page 126/141)
Replace the inverter
board (A2P).
(See page 126/141)
Is each resistance
of the compressor normal?
"Check 3"
(See page 117)
Replace the
compressor (M2C).
(See page 132/148)
00_PB00540A_M10.indb 104 2023/08/09 12:59:07