Refer to Service Manual for details

1
Fault codes
Refer to Service Manual for details
2

Fault codes
To retrieve fault codes from the remote
controller . . . . . . . . . .
Press the CHECK button for approximately ½
second
To clear fault codes from the remote controller
. . . . . . . . . .
Press the CHECK button and hold for
approximately 15 seconds
3

Fault codes
To retrieve fault codes from the outdoor unit
interface PCB
Set SW01, SW02 SW03 to 1
U
I
-
-
Fault code (- - no fault)
Outdoor unit no.
4
Fault codes
Code
0b
Cause
Float switch operation
Float switch open circuit gt 2 minutes
5
Fault codes
Code
04
Cause
No communication between inverter and interface
PCB
6
Fault codes
Code
08
Cause
TS TE sensors detect wrong change in
temperature during heating operation
gt 5ºC after 5 minutes
7
Fault codes
Code
11
Cause
Indoor fan motor alarm
Fan motor circuit connection fault
Capacitor fault
Fan motor fault
Indoor PCB fault
8
Fault codes
Code
CF
Cause
No communication between fan motor PCB and main
PCB at indoor unit.
9
Fault codes
Code
14
Cause
G-Tr short circuit protection
Outdoor unit power source error
Wiring error on inverter PCB
AC fuse disconnection
Inverter compressor fault
Inverter PCB fault
10
Fault codes
Code
17
Cause
Inverter compressor DC current detected during
off cycle
11
Fault codes
Code
1d
Cause
Overload protection (if measured by DC sensor
four times)
Inverter compressor overload current
12
Fault codes
Code
1F
Cause
High motor current (if measured by DC sensor
four times)
Excessive current detected after high current
release
13
Fault codes
Code
21
Cause

• Inverter compressor high pressure switch
  operation

Pressure sensor gt363 psig
14
Fault codes
Code
22
Cause
High pressure
Pressure sensor gt 406 psig
15
Fault codes
Code
87
Cause
Missing phase
Missing phase on outdoor unit power supply
16
Fault codes
Code
89
Cause
Indoor units over capacity
No. of connected indoor units over capacity
Incorrect set-up of indoor unit capacity
17
Fault codes
Code
8d
Cause
Reduction in the number of connected outdoor units
Outdoor unit system set-up
Outdoor unit power source
Comms. cable error between o/d units
BUS communication error
Interface PCB fault
18
Fault codes
Code
8F
Cause
Duplicated terminal outdoor addresses
Address set-up of outdoor unit duplicated
Interface PCB error
19
Fault codes
Code
93
Cause
Indoor unit TC1 sensor fault
20
Fault codes
Code
94
Cause
Indoor unit TC2 sensor fault
21
Fault codes
Code
95
Cause
Communication error between indoor/outdoor units
PQ connection error between indoor/outdoor units
Connection error at indoor PCB
Outdoor interface PCB error
22
Fault codes
Code
96
Cause
PQ connection error between indoor/outdoor units
Incorrect number of indoor units
Wiring connection error on central controller
23
Fault codes
Code
97
Cause
BUS communication alarm
No outdoor communication received by central
controller
Connection error in XY network
Number of indoor units has fallen since last
set-up
24
Fault codes
Code
98
Cause
BUS communication alarm
Miswiring of XY communication cables
Duplicated network addresses
Indoor PCB/central controller error
25
Fault codes
Code
99
Cause
Remote controller alarm
Miswiring of remote controller cables
Duplicated No. 1 indoor unit
Remote controller error
Indoor PCB error
26
Fault codes
Code
9A
Cause
Unauthorised temperature change
Used during self-check function
TC1 detects temperature change gt5ºC during off
cycle
27
Fault codes
Code
9F
Cause
Insufficient change in indoor coil temperature
TC1 and TC2 do not fall more than 4ºC below TA
sensor
Indoor PMV connection error
28
Fault codes
Code
A0
Cause
TD1 sensor open/short circuit
Misconnection at CN502
29
Fault codes
Code
A1
Cause
TD2 sensor open/short circuit
Misconnection at CN503
30
Fault codes
Code
A2
Cause
TS1 sensor open/short circuit
Misconnection at CN504
31
Fault codes
Code
A6
Cause
High discharge temperature
Sensor TD1 detects gt 130ºC three times
Cooling bypass PMV error
32
Fault codes
Code
A7
Cause
High suction temperature
Sensor Ts detects gt 60ºC for 10 minutes - three
times
33
Fault codes
Code
AA
Cause
Pd pressure sensor alarm
Connection error at CN501
Interface PCB error
34
Fault codes
Code
Ab
Cause
Misconnection of Pd/Ps pressure sensors
Pd/Ps sensor error
Compressor inverse operation
35
Fault codes
Code
AE
Cause
High discharge temperature at low load
Sensor TD1 detects gt 110ºC three times
36
Fault codes
Code
AF
Cause
Phase rotation incorrect or incomplete
37
Fault codes
Code
b4
Cause
Ps sensor alarm
Ps sensor error
Ps sensor connection error
Compressor error
38
Fault codes
Code
b5
Cause
External alarm circuit
Notified by resistive connection(10K ohms) to
CN17 on indoor unit PCB
39
Fault codes
Code
b6
Cause
External stop circuit
Notified by short circuit across CN17 on indoor
unit PCB
(Repeated as Eb code at outdoor unit)
40
Fault codes
Code
Eb
Cause
External stop circuit
Notified by short circuit across CN17 on indoor
unit PCB
(Repeated as b6 code at indoor unit)
41
Fault codes
Code
b7
Cause
Fault in networked slave unit
Code available at central controller when slave
units in group have fault code
(Full code available at local remote controller
and inverter outdoor unit)
42
Fault codes
Code
b9
Cause
Indoor pressure sensor alarm
Output voltage error
43
Fault codes
Code
bb
Cause
High discharge temperature
Sensor TD2 detects gt 130ºC three times
44
Fault codes
Code
bd
Cause
Inverter unit - DOL compressor operation detected
during off cycle
Pd Ps pressure sensors
Discharge temperature sensors
45
Fault codes
Code
bE
Cause
Low pressure
Suction pressure lt 3 psig
46
Fault codes
Code
d1
Cause
Master outdoor unit set-up alarm
No. of connected inverter units incoorect
Incorrect set-up of master outdoor unit
Outdoor unit interface PCB fault
47
Fault codes
Code
d2
Cause
Defective slave outdoor unit
48
Fault codes
Code
d3
Cause
TH sensor alarm (IGBT)
49
Fault codes
Code
d4
Cause
TK1 sensor alarm
TK1 sensor open/short circuit
Faulty connection at CN516
Interface PCB fault
50
Fault codes
Code
d5
Cause
TK2 sensor alarm
TK2 sensor open/short circuit
Faulty connection at CN515
Interface PCB fault
51
Fault codes
Code
d6
Cause
TK3 sensor alarm
TK3 sensor open/short circuit
Faulty connection at CN507
Interface PCB fault
52
Fault codes
Code
d7
Cause
Oil level low
Measured by TK1, TK2 and TK3
53
Fault codes
Code
d8
Cause
No oil flow during management process
Measured by TK1 primary side
No temperature change
54
Fault codes
Code
d9
Cause
No oil flow during management process
Measured by TK2 secondary side
No temperature change
55
Fault codes
Code
dA
Cause
Inverter heat sink
TH IGBT sensor too hot
56
Fault codes
Code
db
Cause
No oil flow during management process
Measured by TK1 and TK2
No temperature change
57
Fault codes
Code
dC
Cause
Oil temperature too high
Measured by TK1 primary side at gt 50ºC
58
Fault codes
Code
dd
Cause
Fixed speed unit - compressor operation detected
during off cycle
PD PS pressure sensors
Discharge temperature sensors
59
Fault codes
Code
dE
Cause
Indoor address undefined
Incorrect set-up of indoor PCB
Defective indoor PCB
Communication noise interference
60
Fault codes
Code
dF
Cause
Outdoor address undefined
Defective interface PCB
Communication noise interference
61
Fault codes
Code
E1
Cause
DOL compressor high pressure switch 1
Pressure sensor gt 363 psig
62
Fault codes
Code
F0
Cause
DOL compressor high pressure switch 2
Pressure sensor gt 363 psig
63
Fault codes
Code
E5
Cause
Inverter compressor klixon
Pressure sensor lt363 psig
64
Fault codes
Code
E6
Cause
DOL compressor klixon 1 or overload relay
(manual reset)
Pressure sensor lt 363 psig
65
Fault codes