12-3
TROUBLESHOOTING
SM TRIO52 1-A.2 GB
19
Bad MSMP EEPROM
1 0 0 1 1 Similar as item 11.
Similar as item 11.
20
Heat sink Over Heating
1
0
1
0
0
Normal AC protection
Turn OFF the system and wait for 30 minutes.
Turn ON the system again. If the fault still
exists, return the controller to factory and
report the fault code.
21
Deicing
1 0 1 0 1
Normal AC protection,
no need action.
22
Compressor Over
Heating
1 0 1 1 0
Normal AC protection,
no need action.
23
Compressor Over
Current
1 0 1 1 1
Normal AC protection,
no need action.
24
No OFAN Feedback
1 1 0 0 0
Check for OFAN connection between
controller and OFAN.
25
OFAN locked
1 1 0 0 1
Check for OFAN connection between
controller and OFAN.
26
Compressor start up fail
1
1
0
1
0
Check for compressor wire connection.
27
Bad Communication
1 1 0 1 1
Check for wiring
between IDU and ODU.
…
Reserved
29
No Fault
(Heat Mode)
1 1 1 0 1
30
No Fault
(Cool, Dry, Fan Mode)
1 1 1 1 0
31
No Fault (Stand By)
1 1 1 1 1
CONTENTS
