Airwell YAZE218, Service Manual

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12—TROUBLESHOOTING
SM YAZE218 1-A.2 GB | 12—2
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)
10.
Compressor operates but one or more
units generates no capacity
EEV problem Check EEV (12.4.5)
Refrigerant leakage Check refrigeration system (12.2)
Indoor coil block Clean lters and/or remove block
Outdoor coil block
Remove block and/or avoid air
by-pass
11.
Compressor is over heated and unit
does not generate capacity
EEV problem Check EEV (12.4.5)
Refrigerant leakage Check refrigeration system (12.2)
Indoor coil block Clean lters and/or remove block
Outdoor coil block
Remove block and/or avoid air
by-pass
12. Compressor stops during operation
Electronic control Check diagnostics (see 12.3 below)
Refrigerant leakage Check refrigeration system (12.2)
13. Not all units are operating Communication problems
Check diagnostics (see 12.3 below)
14. Compressor does not start
Electronics control problem or
protection
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
EMC interference to the A/C
unit
Check for EMC problems
(12.4.8.1)
20. Indoor unit(s) Indicator(s) leds may icker
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
Speci c 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 xed 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.