153
Error Codes
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ERROR CODES
Please refer to the Safety Precautions on pages 4-7 for more detail to prevent injury or death regarding the operation and service
troubleshooting of the Multi V product.
WARNING
Error No. 29
Error No. Description Details Causes
29
Master: 291
Slave 1: 292
Slave 2: 293
Outdoor unit
inverter
compressor
overcurrent error.
Inverter compressor input current is >30A.
1. Overload operation (piping is clogged,
indoor or outdoor unit is blocked, EEV is
defective, refrigerant is overcharged).
2. Compressor insulation and / or motor is /
are damaged.
3. Input voltage is low.
4. Outdoor unit Inverter PCB assembly is
damaged.
Is the installation correct?
Recheck power and installation.
1. Check if piping is clogged or has been damaged.
2. Check if outdoor or indoor units are blocked.
3. Check the EEV connector assembly and verify it is operating normally.
4. Check the refrigerant pressure.
ĺ5HLQVWDOORUIL[LISUREOHPVDUHIRXQG
No
Yes
Yes
Are the resistance
between each phase and the
inverter compressor insulation
resistance correct?
No
No
Are the compressor wiring
connections correct?
Yes
No
Yes
No
Is the input voltage normal?
Is the compressor PCB
assembly correct?
Yes
Check if Inverter compressor PCB assembly and IPM are correct.
ĺ5HSODFH,QYHUWHUFRPSUHVVRU3&%DVVHPEO\LIHUURUVDUHIRXQG
Check if R~S / S~T / T~R phase voltage is <180V or >253V
(for 208-230V units), or <414V or >528V (for 460V units).
ĺ&KHFNFRQQHFWLRQVDQGZLULQJLISRZHULVQRWFRUUHFW
1. Check Inverter compressor PCB assembly, U,V,W connections.
2. Check if the wires have disconnected or were damaged.
3. Check compressor terminal connections for bad contacts.
ĺ5HDVVHPEOHLIHUURUVDUHIRXQG
1. Check the resistance between each compressor terminal.
2. Check insulation resistance between compressor terminal and pipe
!ȍ0
ĺ5HSODFHFRPSUHVVRULIHUURUVDUHIRXQG
JQC068MA
Temp. 77°F 167°F
U-V ȍ ȍ
V-W ȍ ȍ
W-U ȍ ȍ
JQC048MA
Temp. 77°F 167°F
U-V ȍ ȍ
V-W ȍ ȍ
W-U ȍ ȍ
JQC068MB / JQC068MBA
Temp. 77°F 167°F
U-V ȍ ȍ
V-W ȍ ȍ
W-U ȍ ȍ
JQC048MB / JQC048MBA
Temp. 77°F 167°F
U-V ȍ ȍ
V-W ȍ ȍ
W-U ȍ ȍ
Always apply heat transfer paste to the new inverter PCB heat sink before
installing. For instructions, see “Replacing the Inverter PCB Heat Sink” page
later in this section.
See the “Checking the
Inverter Insulated-Gate
Bipolar Transistor
Module” page in the
“Troubleshooting Main
Components” section.
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