Service manual

13-9
TROUBLESHOOTING
SM CINCO 1-A.1 GB
№ Fault Name 5 4 3 2 1
27 Using EEPROM data 1 1 0 1 1
28 Model A 1 1 1 0 0
29 Model B 1 1 1 0 1
30 Model C 1 1 1 1 0
31 Model D 1 1 1 1 1
1 - ON; 0 - OFF
Only one code is shown. Order of priority is lower to the higher number. Diagnostics is continuously ON as long power is
on.
13.4.5 Indoor unit diagnostics and corrective actions
№. Fault Probable Cause Corrective Action
1-4 Sensor failures Sensors not connected or damaged Check Thermistor ( 13.5.13)
7 Communication mismatch Mismatch between IDU and ODU
models
Units are not designed to operate
together as system. Check and
replace the models installed.
8 No Communication IDU-ODU communication Check communication between
indoor and outdoor units ( 13.5.17)
9 No Encoder Indoor electronics or motor Check motor wiring, if ok, replace
motor
If still not ok replace Indoor electronic assembly
11 Outdoor Unit Fault Outdoor controller problem Check for any fault code shown on
outdoor unit display board and act
accordingly ( 13.4)
17-18 Protections Indication No action
19 Outdoor Unit Protection Compressor stopped due to outdoor
unit protection
Normally no action is required
If the problem persists for more than
twice on each hour, Check for any
fault code shown on outdoor unit
display board and act accordingly
( 13.4)
20 Indoor Coil HP Protection Compressor stopped due to high
pressure (heating) protection
Normally no action is required
If the problem persists for more
than twice on each hour, check for
refrigerant leak and thermodynamic
operation ( 13.3)
21 Overflow Protection Compressor stopped due to water level
overflow protection
Check the drainage tube for any
clog.
24 EEPROM Not Updated System is using ROM parameters and
not EEPROM parameters
No action, unless special parameters
are required for unit operation.
25 Bad EEPROM
No action, unless special parameters
are required for unit operation.
26 Bad Communication IDU-ODU communication
Check communication between
indoor and outdoor units ( 13.5.17)
27 Using EEPROM data No problem
28
IDU model
Indoor unit model connected is shown:
Model A
No problem
29 Indoor unit model connected is shown:
Model B
30 Indoor unit model connected is shown:
Model C
31 Indoor unit model connected is shown:
Model D