Daikin 10 - List of Warning Codes

●Troubleshooting
111
7
Troubleshooting
Troubleshooting
3-4. List of warning codes
Warning
code
Warning
level
Details Operating conditions Remarks Reference
A5 － Low oil level
①Clog of suction filter
② Increased pressure loss of oil circuit
③Use of viscous oil
Warning history record
only
P.112
A7 －
Rise in power supply
voltage for fan
Fan power supply voltage
exceeds 380 V
Warning history record
only
Keep the power supply voltage
within the specified range.
E9 －
Electronic expansion
valve for main circuit
correction
Faulty EE valve or MO valve
operation
Warning history record
only
P.113
H1 2
Faulty room
thermistor
The thermistor is disconnected or short-
circuited (when not used for control)
P.114
J3 1
Faulty discharge
thermistor
The thermistor is disconnected
or short-circuited
To protect the oil cooling unit, alarm
occurs after 150 hours of running,
and then the unit is stopped.
P.114
J4 1
Faulty EE valve
outlet thermistor
The thermistor is disconnected
or short-circuited
To protect the oil cooling unit, alarm
occurs after 150 hours of running,
and then the unit is stopped.
P.114
J6 1
Faulty
condenser
thermistor
The thermistor is disconnected
or short-circuited
To protect the oil cooling unit, alarm
occurs after 150 hours of running,
and then the unit is stopped.
P.114
JH 2
Faulty inlet oil
thermistor
The thermistor is disconnected or short-
circuited (when not used for control)
P.114
JJ －
Faulty outlet
or optional oil
thermistor
The thermistor is disconnected
or short-circuited (when not
used for control)
Warning history record
only
P.114
P3 －
Faulty switch
box thermistor
The thermistor is disconnected
or short-circuited
Warning history record
only
P.114
P4 2
Faulty fin
thermistor
The thermistor is disconnected
or short-circuited
AKZ90A,
AKZ56A/90A-500 only
P.114
L3 －
High
tempetature
switch box
Switch box temperature
exceeds the threshold
Warning history record
only
Check if there are any
problems with the following.
① Are there any obstacles
in the intake and exhaust
ports of the unit?
② Is the radiation fin clean?
③ Is the ambient
temperature too high?
LH －
Rise in main
circuit voltage
When the following main circuit
voltage values are detected
•
AKZ14A–90A: 380 V
•
AKZ14A–90A-500: 760 V
Warning history record
only
Keep the power supply
voltage within the
specified range.
F6 2 Rise in pressure
①
Decreased air volume (clog of
air filter or obstacles around
suction and exhaust port)
② Running out of high
temperature range
P.115
U0 －
Malfunction of
EE valve for
main circuit
When ① and ② continue for
180 seconds.
① Command capacity ≧95%
②
Condenser temperature - EE
valve outlet temperature ≦5℃
Warning history record only
If the alarm code U0 is in
the history data, check the
troubleshooting for alarm
U0. (See page 106)
Unit automatically
performs operation to
remove blockages from
EE valve for main circuit
(no action by operator)
Warning level 1: Warning lamp blinks + Warning code display + alarm occurs after 150 hours of running
Warning level 2: Warning lamp lit + Warning code display
－: Warning lamp off + No display (warning history record only)
00_PB00540A_M10.indb 111 2023/08/09 12:59:08