3 – 16
Problem
symptom
Outdoor
unit
indication
(LED1)
Indoor unit
Malfunction
No.*
Content of diagnosis Check point Action
→
Lamp Main Sub Main Sub
Indoor and
outdoor
units do not
operate.
12- ime O O O O O Timer (Orange) 12 0 Thermal fuse
in terminal
board
Thermal fuse error
in terminal board (for
power supply)
1) Check he thermal fuse
in terminal board (for
Power supply)
2) Check connector CN5 of
the outdoor unit.
3) 1) 2): Normal
1) Replace terminal
board for Power
supply.
2) Correct he installa-
tion.
3) Replace the outdoor
unit control PCB
assembly.
O O Operation (Green)
Plasmacluster (Blue)
Indoor and
outdoor
units do not
operate.
13- ime O O O O O Timer (Orange) 13 0 DC
compressor
Compressor startup
error
1) Check he colors (red,
white, orange) of the
compressor cords for
proper connection.
(PWB side, compressor
side)
2) Check if he IPM terminal
resistance values are
uniform.
3) Check if outdoor main
relay (MRY1) turns on
and voltage of both end
of the condenser (C8
or C9) has become
DC290-330V.
4) 1) 2) 3) : Normal
1) Correct the installa-
tion.
(U: Red, V: White, W:
Orange)
2) Replace the outdoor
unit control PWB
assembly.
3) Replace the outdoor
unit control PWB
assembly.
4) Replace the com-
pressor.
O O O Operation (Green)
Plasmacluster (Blue)
O O O O O Timer (Orange) 1 Compressor rota ion
error.
(at 120° energizing)
O O O Operation (Green)
O Plasmacluster (Blue)
O O O O O Timer (Orange) 2 Compressor rota ion
error
(at 180° energizing)
O O O Operation (Green)
O Plasmacluster (Blue)
Indoor and
outdoor units
operate.
O O O O O Timer (Orange) 3 Detection error of
inverter current
Check the circuit of
detection of inverter
current.
Replace the outdoor
unit control PWB
assembly.
O O O Operation (Green)
O O Plasmacluster (Blue)
Indoor and
outdoor
units do not
operate.
14- ime O O O O O Timer (Orange) 14
0 Outdor unit
PAM
PAM over voltage
error
1) Check the AC power
supply voltage for
2) No abnormality found in
above inspection.
1) Correct he installa-
tion.
2) Replace the PWB
assembly.
O O O Operation (
Green
)
Plasmacluster (Blue)
O O O O O Timer (Orange)
1 PAM clock error Check the PAM clock for
proper input.
Replace the outdoor
unit control PWB
assembly.
O O O Operation (
Green
)
O Plasmacluster (Blue)
O O O O O Timer (Orange)
2 PAM under voltage
error
1) Check the AC power
supply voltage for
2) No abnormality found in
above inspection.
1) Correct he installa-
tion.
2) Replace the PWB
assembly.
O O O Operation (
Green
)
O Plasmacluster (Blue)
Indoor unit
operates.
Outdoor unit
does not
operate.
Lighting or
OFF
O O O O O Timer (Orange) 17
0 Wiring
between
units
Serial opencircuit 1) Check he wires between
units.
2) Check voltage between
N and 1 the indoor/
outdoor unit terminal
boards.
3) Check the outdoor unit
fuse.
4) Check 15-V,12-V and
5-V voltages on the
PCB.
Check resistance between
IPM terminals.
5) Check pins No 3 and 5
of connector CN3 of he
outdoor unit fan motor
for shortcircuit.
6) Outdoor unit control
PCB.
1) Connect stable
power supply.
Correct the wiring.
2) Replace the outdoor
unit control PWB
assembly.
3) Replace the fuse/
outdoor unit control
PWB assembly.
4) Replace the outdoor
unit control PWB
assembly.
5) Replace the outdoor
unit fan motor.
6) Replace the outdoor
unit control PWB.
O O Operation (
Green
)
Plasmacluster (Blue)
Indoor unit
operates.
Outdoor unit
does not
operate.
Lighting or
OFF
O O O O O Timer (Orange) 18
0 Wiring
between
units
Serial opencircuit Check the wiring between
units.
Correct the wiring.
O O Operation (
Green
)
Plasmacluster (Blue)
Indoor and
outdoor
units do not
operate.
O O O O O Timer (Orange)
1 Check the wiring between
units.
Correct the wiring.
O O Operation (
Green
)
O Plasmacluster (Blue)
AE-X15PU
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