13-1
TROUBLESHOOTING
SM HAFRPM 2-A.1 GB
13. 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.
4
Indoor fan does not start
(louvers are opened and
Green LED lights up).
Unit in HEAT MODE and coil
is still not warm.
Change to COOL MODE and
check.
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.