Daikin 10 - Page 106

●Troubleshooting
103
7
Troubleshooting
Troubleshooting
5
Troubleshooting
Diagnosis Countermeasures
1
Applicable Models
AKZ**A (All series)
2
Methods of Malfunction Detection
Detect according to the
compressor (M2C) revolutions
at startup.
3
Malfunction Decision Conditions
Class Conditions
70
The compressor does
not rotate smoothly.
(Retry: 3 times)
71
When single-phase
open phase of the
compressor is detected.
(Retry: 3 times)
72
When two- or three-
phase open phase or
current abnormality
of the compressor is
detected.
(Retry: 3 times)
4
Supposed Causes
1Faulty pressure equalization
1Faulty compressor (M2C)
wire connections
1Faulty compressor (M2C)
(incomplete lock)
1Faulty inverter board (A2P)
1Faulty EE valve (Y1E)
Control panel display
L9
Faulty Compressor Startup
YES
Correct the compressor
(M2C) wiring.
(See page 132/148)
Rectify the faulty
pressure equalization.
Check the alarm code in service monitor mode.
Disconnected
or erroneous wire connections
of the compressor are
present. (*1)
L9.71
L9.72
Replace the inverter
board (A2P).
(See page 126/141)
NO
YES
*1: If the compressor stops immediately after the
compressor rotating sound is heard, it is highly
possible that the wire is disconnected.
Replace the
compressor (M2C).
(See page 132/148)
NO
Is there a
significant difference in
temperature of respective parts
of the refrigerant before
startup?
YES
L9.70
LED 300 is
blinking (Inverter board)
"Check 4"
(See page 117)
00_PB00540A_M10.indb 103 2023/08/09 12:59:07