Troubleshooting
MCAC-UTSM-2008-04
48
Outdoor Units
9.2 Outdoor unit 18000Btu/h malfunctions:
Display
Malfunction or Protection
E0
EEPROM malfunction
E2
Communication malfunction between indoor/outdoor units
E3
Communication malfunction in outdoor PCB
E4
Outdoor temperature sensors malfunction
E5
Compressor voltage protection
P0
Compressor top temp. protection
P1
High pressure protection
P2
Low pressure protection
P3
Compressor current protection
P4
Compressor discharge temperature protection
P5
Condenser high temperature protection
P6
IPM protection
Note
:
12000Btu/h: Its malfunctions are displayed on the indoor units
’
indicator.
18000Btu/h: Its malfunctions are displayed on the outdoor units
’
digital tube.
1. E0 malfunction
LED indicates E0
EEPROM malfunction
Judge 1: Check whether the EEPROM is inserted well
Yes
No
Insert the EEPROM well
Replace outdoor main board
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Summary of Contents for ACP-12CT32AEI/I
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