Table of Contents
Advertisement
No
Symptom
Outdoor unit display board and
7
leds are off
Compressor operates but no
8
capacity
Compressor is over heated and
9
unit does not generate capacity
Compressor stops during
10
operation
11
Unit is not operating
12
Compressor does not start
Unit works in wrong mode (cool
13
instead of heat or heat instead of
cool)
All components are operating
14
properly but no cooling or no
heating
Compressor motor is generating
15
noise and no suction occurs
Freezing of outdoor unit in heat
16
mode and outdoor unit base is
blocked with ice
The unit stop suddenly during
17
operation
Indoor unit(s) Indicator(s) leds
18
may flicker
SM LEXDCI 1-E.1 GB
Probable Cause
No power supply
PFC Chock coil
Burnt fuse
EEV problem
Refrigerant leakage
Indoor coil block
Outdoor coil block
EEV problem
Refrigerant leakage
Indoor coil block
Outdoor coil block
Electronic control
Refrigerant leakage
Communication
problems
Electronics control
problem or protection
Electronics or RV
problem
Refrigerant leak
Phase order to
compressor is wrong
EMC interference to the
A/C unit
CONTENTS
TROUBLESHOOTING
Corrective Action
Check the connections
and the wiring on the main
terminal - Repair if needed.
Check the PFC Chock coil
Check 20A fuse on the Filter
Check EEV
Check refrigeration system
Clean filters and/or remove
block
Remove block and/or avoid
air by-pass
Check EEV
Check refrigeration system)
Clean filters and/or remove
block
Remove block and/or avoid
air by-pass
Check diagnostics
Check refrigeration system
Check diagnostics
Check RV
Check refrigeration system
Check compressor phase
order
Connect base heater
Check for EMC problems
13-11
Hide quick links:
Advertisement
Table of Contents
