Daikin 10 - Page 116

●Troubleshooting
113
7
Troubleshooting
Troubleshooting
5
Troubleshooting
Diagnosis Countermeasures
1
Applicable Models
AKZ**A (All series)
2
Methods of Malfunction Detection
1 Detect by the status of the
minimum opening correction
of the EE valve.
<Requisition of EE valve minimum
opening correction>
When the EE valve outlet
temperature lower than the
levels shown below is detected,
the EE valve minimum
opening is corrected by +1
pulse (corrected to 12 pulses
maximally).
・ AKZ14A, 56A, 90A: -15℃ or
lower
AKZ32A, 43A: -10℃ or lower
3
Malfunction Decision Conditions
The EE valve minimum opening
correction is carried out for
twelve times (12 pulses).
4
Supposed Causes
1Wrong EE valve minimum
pulse setting (set to n024).
1Faulty electronic expansion
valve for main circuit (EEV)
(Y1E) operation.
1Faulty motor operated valve
for hot gas (MOV) (Y2E)
operation.
Electronic expansion valve for main circuit correction
YES
Select such oil that the
oil viscosity is 200mm
2
/s
or less.
Rectify the clogged
part.
There is
a clogged part in the
oil piping system, thus resulting
in decrease in
flow rate.
The
viscosity is more than
200mm
2
/s or more when the oil
temperature is
decreased.
YES
Replace the EEV (Y1E)
or MOV (Y2E) without
latch noise.
(See page 128/143/150)
YES
NO
NO
Replace the EEV (Y1E)
coil or MOV (Y2E) coil.
(See page 128/143/150)
The coil resistance
of the EEV (MOV) is normal.
"Check 2"
(See page 116)
NO
YES
NO
No latch
noise comes from
EEV or MOV.
Replace the EEV (Y1E)
or MOV (Y2E).
(See page 128/143/150)
If “E9” is recorded in the
history again after
operation, ask the
customer to check
again the model
selection method.
YES
NO
Perform “Pulse detection
operation with EEV
(MOV) fully closed”.
(See page 150)
"E9" is
displayed during
“Pulse detection operation
with EEV (MOV) fully
closed”.
Control panel display
E9
History record only
00_PB00540A_M10.indb 113 2023/08/09 12:59:08