Daikin 10 - Page 96

●Troubleshooting
93
7
Troubleshooting
Troubleshooting
5
Troubleshooting
Diagnosis Countermeasures
1
Applicable Models
AKZ**A (All series)
2
Methods of Malfunction Detection
Detect the malfunction
according to the opening during
“Pulse detection operation with
EEV (MOV) fully closed” and
EE valve outlet temperature.
1 
EEV for main circuit (Y1E)
1  MOV for hot gas (Y2E)
1  Detect a blown fuse immediately
after turning power on
1  Detect wiring fall-out
3
Malfunction Decision Conditions
Class Conditions
10
Abnormality in detection
of minimum opening of
the electronic expansion
valve for main circuit.
11
Blown fuse abnormality of
the electronic expansion
valve for main circuit.
12
Blown fuse abnormality of
the motor operated valve
for hot gas.
4
Supposed Causes
1Faulty EEV (Y1E) coil or
MOV (Y2E) coil
1Faulty control board (A1P)
1Faulty mounting of EEV
(Y1E) coil or MOV (Y2E) coil
1Inadequate oil level
1Faulty operation of EEV
(Y1E) or MOV (Y2E)
Control panel display
E9
Malfunction of Electronic Expansion Valve for main circuit (EEV),
Motor Operated Valve for hot gas (MOV)
YES
YES
NO
NO
Replace the EEV (Y1E)
coil or MOV (Y2E) coil
without latch noise.
(See page 128/143/150)
↓
When the power is
turned ON again and
there is no latch noise,
replace the EEV (Y1E)
or MOV (Y2E) without
latch noise.
(See page 128/143/150)
Replace the EEV (Y1E)
coil or MOV (Y2E) coil.
Replace the control
board (A1P).
Connect the connector properly.
・EEV (Y1E)
→
Control board (A1P):
Connector S90
・MOV (Y2E)
→
Control board (A1P):
Connector CN7
NO
Restore the operation
mode and restart
operation.
YES
The alarm code
“E9” reoccurs.
To the next page
B
○
*1: For setting procedures of operation mode, see page 61.
*2: “Pulse detection operation with EEV (MOV) fully closed” running
procedures.
While in parameter setting mode, input “0” to data of the parameter n024.
↓
The “Pulse detection operation with EEV (MOV) fully closed” will be initiated
and then, completed in a period of approximately five minutes.
YES
Check the alarm code in service monitor mode.
NO
No latch
noise comes from
EEV or MOV.
Turn OFF the power
supply and then ON again.
E9.10 E9.11
E9.12
Set to “1%” in the operation mode 9,
and run for five minutes.
(*1)
Once again, perform “Pulse detection
operation with EEV (MOV) fully closed”. (*2)
EEV (MOV)
connector is
properly connected
to the board.
Is the coil resistance
of the EEV (MOV) normal?
"Check 2"
(See page 116)
00_PB00540A_M10.indb 93 2023/08/09 12:59:06