Service manual

13-4
TROUBLESHOOTING
SM CINCO 1-A.1 GB
№ SYMPTOM / PROBLEM PROBABLE CAUSE CORRECTIVE ACTION
18 Compressor is generating
abnormal noise
Phase order to
compressor is wrong
Check compressor phase order
Compressor internal
parts wearing
Replace compressor (14.1.11.)
Vibration
Check all piping connections
Check compressor rubbers are fixed well
Check all screws on unit metal chassis are tightened
Check that no piping is in contact with each other or with
other parts.
19 Freezing of outdoor unit coil
in heat mode and outdoor
unit base is blocked with
ice
Connect base heater
20 The unit stop suddenly
during operation
EMC interference to
the A/C unit
Check for EMC problems ( 13.5.20.1)
21 Indoor unit Indicator leds
may flicker
22 Other home appliances
operation is faulty such
as noise appears in the
television picture, or the
picture is distorted or static
occurs in the radio sound
EMC interference by
the A/C unit
Check for EMC problems ( 13.5.20.2)
23 All others Check for any fault code shown on display board and act
accordingly ( 13.4)
13.3 Checking the refrigeration system
Checking system pressures and other thermodynamic measures should be done when system is in technician Mode where
the system operates as in fixed settings. The performance curves given in this manual are given for unit performance in
Technician mode when high indoor fan speed is selected.
For entering technician mode check 12.8
13.4 Troubleshooting by Diagnostics Codes
13.4.1 Fault codes Outdoor unit
If any fault exists in the system, its fault will be shown according to the following coding method.
The 5 last fault occurred in the system will be stored in the EEPROM.
If no fault exist in the system, no fault code will be displayed during normal operation mode. STATUS LED is blinking 5
times in 5 seconds, and shut off for the next 5 seconds.
FAULT LED will blink during the same 5 seconds according to the following table.
The LED coding method is as follow: