36
Er [E][r] fault code refers to Outdoor unit
1C Refer to O/D 1C Refer to O/D 08 Four-way valve alarm.
A0 Discharge temp. sensor (TD1) short circuit
A1 Discharge temp. sensor (TD2) short circuit
A2 Suction temp. sensor (TS) short circuit
A4 External air sensor (THo) short circuit
A5 Outdoor heat exchanger sensor (TE) short circuit
A6 Discharge temp. (TD1 and TD2) protective operation
A7 Suction temp. (TS) protective operation
AA High pressure sensor (Pd) short circuit
Ad DOL compressor fault
AE Low pressure fault (Ps)
AF Outdoor Unit power source phase order miswiring
1C Extension IC, EEPROM short circuit
14 Refer to O/D 14 Refer to O/D 14 G-Tr short-circuit protective operation
17 Refer to O/D 17 Refer to O/D 17 Current detection circuit
21 Refer to O/D 21 Refer to O/D 21 High pressure SW circuit
1d Refer to O/D 1d Refer to O/D 1d Compressor error
1F Refer to O/D 1F Refer to O/D 1F Inverter malfunction
d3 Refer to O/D d3 Refer to O/D d3 TH sensor circuit - Inverter microprocessor (IPDU)
dA Refer to O/D dA Refer to O/D dA Heat sink overheat protective operation (IPDU)
NOTE:
• To retrieve fault codes from the outdoor unit ensure rotary switch SW1 is set to position ‘2’ and SW2 is set to position ‘0’.
• To retrieve fault codes from the Multi Controller ensure the display switch is set to position ‘1’.
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Fault code display
Self-diagnostic function
No communication signal between Interface PCB and IPDU
04 No communication signal between M/C and O/D
No communication signal between I/D and M/C
0b Drain pump fault - I/D unit
0C TA sensor fault
0d TC sensor fault
08 Reverse TC temperature change
09 No TC temperature change
11 Motor short circuit
12 Indoor PC board short circuit
b5 External input display fault
(Low level refrigerant leak if RBC-RD1-PE fitted)
b6 External interlock display fault
(High level refrigerant leak if RBC-RD1-PE fitted)
97 Central management communication short circuit
98 Central management address set-up fault
99 No communication I/D to R/C
04 No communication signal between Interface PCB and IPDU
No communication signal between M/C and O/D.
04 No communication signal between Interface PCB and
IPDU
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Remote controller fault code Multi Controller fault code Outdoor fault code
8A Multi Controller PCB error
88 Communication error between outdoor unit and Multi
Controller
80 ThA sensor fault 80 ThA sensor fault
81 ThB sensor fault 81 ThB sensor fault
82 ThC sensor fault 82 ThC sensor fault
83 ThD sensor fault 83 ThD sensor fault
84 ThX sensor fault 84 ThX sensor fault
0b Drain pump fault - M/C unit 0b Drain pump fault - M/C unit
89 Indoor units capacity codes too high or set to 0 89 Over capacity
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15 Refer to M/C
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