13-15
TROUBLESHOOTING
SM PNXDCI 1-A.1 GB
No
Fault Name
Probable Cause
Corrective Action
18 No communication A
No signals in line A
Check communication
19 Compressor- Ilegal
Speed
Exceeds speed low limit
See # 13
20 System Configuration
Changed
Communication lines changed
from last operation
No problem just an
announcement
21 System Configuration
Problem
Miss-match between the IDUs
connected to port A,B,C or D,
or the total capacity code of
IDUs is higher than the ODU
maximum capacity code
Change configuration if
needed.
22
Heat sink Over
Heating Fault/
Protection
Compressor stopped due to
heatsink protection
Check that the airflow around
the ODU is free and the fan is
running free. Check fan motor
(0)
23 Deicing Protection
During deicing procedure
No action required
24 Compressor Over
Heating Protection
Compressor stopped due to
over heat protection
Check if gas is missing in the
system
25 System over power
Protection
Compressor stopped due to
over power protection
No action required
26 Bad EEPROM
EEPROM not operating
Power reset. (Replace
Controller just in case you need
EEPROM).
27 Not Configured
Cannot start the control
Power reset. Replace
Controller if didn’t help
28 Bad Communication
Bad communication lines
See # 18-21
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