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●
Specifications
Working Temperature
Range
Refrigerant Used
Insulation Resistance
Withstand Voltage
Rated Voltage
Drive Condition
Coil Resistance
Insulation Class
Wiring Diagram,
Drive Circuit and
Activation Mode
● Checking Method of Electronic Expansion Valve for Indoor Unit
Locked
Check for the liquid pipe temperature during heating operation.
(Fully Closed)
It is abnormal if the temperature does not increase.
Locked
It is abnormal under the following conditions. The temperature of freeze protection
(Slightly Open)
thermistor becomes lower than the suction air temperature when the unit being
checked is stopped and the other units are in cooling operation.
Locked
(Fully Open)
SM-18001-rev.1
o
-22
F to 158
Min. 100MW (at 500VDC Megger)
500VAC for 1 Minute or 600VAC for 1 Second
DC12V+1.2V
100 - 200 PPS
2-2 Phase Excitation
150+15W (68
White
Red (COM)
Orange
Phase
1
f1
ON
OFF
f2
ON
f3
OFF
f4
OFF
OFF
OPEN: 4
3
2
CLOSE: 1
2
3
Checking Method
Measure coil resistances between Red (common)
and each phase.
The measured resistance value is normal if apploximately 150 W. *)
o
(*) Ambient Temperature 68
Indoor Unit Electronic Expansion Valve
Electronic Expansion Valve
Unit
Under
Checking
o
o
o
F (-30
C to 70
C)
R410A
o
o
F (20
C))
Class E
φ1
M
φ3
φ2
φ4
Yellow
Blue
2
3
4
OFF
ON
ON
OFF
OFF
ON
ON
OFF
ON
ON
1
4
4
1
o
F (20
C))
Freeze Protection
Thermistor
Other
Units
MAINTENANCE
(Main Parts)
4-55
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Troubleshooting
