TROUBLESHOOTING
12-1
SM TELECOM 1-A.0 GB
12. TROUBLESHOOTING
No.
SYMPTOM
PROBABLE CAUSE
CORRECTIVE ACTION
1
Power supply indicator
(Red LED) does not light
up.
No power supply.
Check power supply. If power
supply is OK, check display
and display wiring, if OK,
replace PCB.
2
Unit does not respond to
remote control command.
Remote control
command did not reach
the indoor unit.
Check remote control
batteries. If batteries are OK,
check display and display
wiring, if OK, replace PCB.
3
Unit responds to remote
control command but
operate indicator (Green
LED) does not light up.
Problem with display
PCB.
Replace display PCB.
Unit in HEAT MODE and
coil is still not warm.
Change to COOL MODE and
check.
4
Indoor fan does not start
(louvers are opened and
Green LED lights up).
Problem with PCB or
capacitor.
Change to HIGH speed and
check power supply to motor is
higher than 130 VAC. If OK
replace capacitor, if not OK
replace controller.
5
Indoor fan works when
unit is OFF, and indoor fan
speed is not changed by
remote control command.
PCB problem.
Replace controller.
6
Compressor does not
start.
Electronics control
problem or protection.
Perform diagnostics, and
follow the actions described
below.
7
Compressor stops during
operation and Green LED
remains on.
Electronic control or
power supply problem.
Perform diagnostics, and
follow the actions described
below.
8
Compressor is ON but
outdoor fan does not work.
Problem with outdoor
electronics or outdoor fan
capacitor.
Switch unit to COOL mode,
HIGH speed with 16 degrees
set point (summer) or HEAT
mode high speed with 30
degrees set point (winter).
Check power supply to motor
is higher than 130 VAC. If OK
replace capacitor, if not OK
replace controller.
9
Unit works in wrong mode
(cool instead of heat or
heat instead of cool).
Electronics or power
connection to RV.
Check RV power connections.
If OK, check RV operation with
direct 230 VAC power supply,
if OK, replace outdoor
controller.
10
All components are
operating properly but no
cooling or heating.
Refrigerant leak.
Check refrigeration system.
CONTENTS
Summary of Contents for GC 12 LT
Page 13: ...OUTLINE DIMENSIONS 4 3 SM TELECOM 1 A 0 GB 4 5 Outdoor Unit GC 30T LT CONTENTS...
Page 28: ...CONTROL SYSTEM 11 3 SM TELECOM 1 A 0 GB 11 1 4 Main PCB Controller CONTENTS...
Page 70: ...EXPLODED VIEWS SPARE PARTS LISTS 13 6 SM TELECOM 1 A 0 GB 13 6 Outdoor Unit GC 12 LT CONTENTS...
Page 72: ...EXPLODED VIEWS SPARE PARTS LISTS 13 8 SM TELECOM 1 A 0 GB 13 8 Outdoor Unit GC 18 LT CONTENTS...
Page 87: ...APPENDIX A 15 1 SM TELECOM 1 A 0 GB APPENDIX A INSTALLATION AND OPERATION MANUAL CONTENTS...
