Airwell SX 12 DCI, Service Manual

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TROUBLESHOOTING
12-2
SM YAZ318 1-A.1 GB
No SYMPTOM PROBABLE CAUSE CORRECTIVE ACTION
- Repair if needed
PFC Chock coil Check the PFC Chock coil
Burnt fuse
Check 20A fuse on the Filter
(12.4.2)
EEV problem Check EEV (12.4.5)
Refrigerant leakage
Check refrigeration system
(12.2)
Indoor coil block
Clean filters and/or remove
block
10.
Compressor operates but one or
more units generates no capacity
Outdoor coil block
Remove block and/or avoid
air by-pass
EEV problem Check EEV (12.4.5)
Refrigerant leakage
Check refrigeration system
(12.2)
Indoor coil block
Clean filters and/or remove
block
11.
Compressor is over heated and unit
does not generate capacity
Outdoor coil block
Remove block and/or avoid
air by-pass
Electronic control
Check diagnostics (see 12.3
below)
12. Compressor stops during operation
Refrigerant leakage
Check refrigeration system
(12.2)
13. Not all units are operating
Communication
problems
14. Compressor does not start
Electronics control
problem or protection
Check diagnostics (see 12.3
below)
15.
Unit works in wrong mode (cool
instead of heat or heat instead of
cool)
Electronics or RV
problem
Check RV (12.4.4)
16.
All components are operating
properly but no cooling or no
heating
Refrigerant leak
Check refrigeration system
(12.2)
17.
Compressor motor is generating
noise and no suction occurs Phase order to
compressor is wrong Check compressor phase
order
18.
Freezing of outdoor unit in heat
mode and outdoor unit base is
blocked with ice
Connect base heater
19.
The unit stop suddenly during
operation
20.
Indoor unit(s) Indicator(s) leds may
flicker
EMC interference to the
A/C unit Check for EMC problems
(12.4.8.1)
21.
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
(12.4.8.2)
22. All others
Specific problems of
indoor or outdoor units Check diagnostics (see 12.3
below)
12.2 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, refer to 11.7.