User Manual

TROUBLESHOOTING
14-6
14.1.7 MONO SPLIT RAK-18/25/35PPA / RAC-18/25/35WPA , RAK-18/25/35/50PEA / RAC-18/25/35/50WEA ,
RAF-25/35RPA / RAC-25/35FPA
Warning
Remember that voltage of 175V is applied to the 0V line on the
P.W.B. or the like as shown in the diagram below
Warning
When using an oscilloscope, never ground it. Don’t forget
that high voltage as noted in the left figure may apply to the
oscilloscope.
14.1.8 MONO SPLIT RAK-50/60/70PPA / RAC-50/60/70WPA
Warning
Remember that voltage of 175V is applied to the 0V line on the
P.W.B. or the like as shown in the diagram below
Warning
When using an oscilloscope, never ground it. Don’t forget
that high voltage as noted in the left figure may apply to the
oscilloscope.
Indoor controller
Power
Switch
Voltage at point
Ⓐ
B
C
D
Power
inlet
Control
P.W.B
Grounding
Main P.W.B
Outdoor controller
DC35V
0V
0V Line
ⒶPoint
Ⓑ
Point
Compressor
motor
I.P.M.
Point
Ⓑ
(0V line)
Ground voltage
⊕175V
⊝175V
350V
Always keep your
hands and metallic
things away from
the cabinet.
DANGER!
Don’t install
the ground
line
A
Control Circuit
Power source
1¤, 240V, 50Hz
Outdoor Electrical
Indoor Electrical
Compressor
Motor
C
D
(0V)
ⓑ
ⓐ
Power circuit
Across
ⓐ
-
ⓑ
(0V line) approx 320~360V
Across
ⓐ
-ground approx 155~170V
Across
ⓑ
(0V line)-ground approx 155~170V
Outdoor unit
P.W.B.
Always keep your
hands and metallic
things away from
the oscilloscope
DANGER!
Don’t install
the ground
line
Control Circuit
L
N