Daikin 10 - Page 92

●Troubleshooting
89
7
Troubleshooting
Troubleshooting
5
Troubleshooting
Diagnosis Countermeasures
YES
NO
There is
an obstacle in the air
intake/exhaust of
the unit.
Remove the obstacle.
(Contact the customer.)
YES
NO
Is the
condenser thermistor
normal?
YES
YES
NO
Is the coil
resistance of the EE valve
(Y1E) and MO valve (Y2E) normal?
"Check 2"
(See page 116)
Replace the EE valve
(Y1E) coil or MO valve
(Y2E) coil.
Replace the condenser
thermistor (Th-7).
(See page 131/147)
After a lapse of 10 minutes with the compressor in stop state, disconnect the connector
S171 of the control board (A1P), and check the conduction of the high-pressure switch
Check the alarm code in service monitor mode.
NO
Is there conduction?
Replace the high
pressure
switch (S3PH).
(See page 129/144)
To the next page
A
○
E3.10 E3.50
Measure the resistance of the condenser thermistor.
"Check 1" (See page 116)
Applicable to "C" models only
YES
NO
Is
temperature
detected by condenser
thermistor about
60°C?
Check for blockage in
refrigerant piping.
Control panel display
E3
Malfunction due to High Pressure or Condenser Temperature
1
Applicable Models
1． Malfunction due to
condenser temperature
AKZ**A
(All series including "-C" models)
2． Malfunction due to high
pressure
AKZ**A-C
2
Methods of Malfunction Detection
1． Detect with the condenser
thermistor (Th-7)
(located in the middle of the
condenser)
2． Detect the presence/
absence of conduction with
the high pressure switch
(S3PH)
(located in the discharge
pipe)
3
Malfunction Decision Conditions
Class Conditions
10
The condenser
thermistor exceeds
62℃.
50
When the high pressure
switch is actuated.
Actuating pressure: 4.1 MPa
Resetting pressure: 3.2 MPa
4
Supposed Causes
1 Obstacle around the equipment
1Dirty air filter
1Room temperature too high
1Oil inlet temperature too high
1Faulty condenser thermistor
(Th-7)
1Faulty high pressure switch
(S3PH)
1Faulty EE valve (Y1E) or MO
valve (Y2E)
1Dirty or clogged condenser
1Faulty fan
1Short circuit of intake and
exhaust
00_PB00540A_M10.indb 89 2023/08/09 12:59:06