CW-C180EF-W, CW-C180EF-
M & CW-SC180EF
CW-C240EF
Item
Pressure
(MPa)
Temperature
(°C)
Pressure
(MPa)
Temperature
(°C)
A
2.09 ~ 2.19
64 ~ 83
2.23 ~ 2.30
72 ~ 88
B
1.94 ~ 2.04
38 ~ 48
2.01 ~ 2.16
35 ~ 45
C
0.54 ~ 0.63
8 ~ 12.5
0.52 ~ 0.56
6.5 ~ 10.5
D
0.48 ~ 0.54
5.5 ~ 13.5
0.50 ~ 0.54
4 ~ 12
Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB) for Cooling.
4 Refrigeration Cycle Diagram
5 Air Conditioner Performance Evaluation
Intake & Discharge Air
Temperature Difference
Current Drain
Determination
Remedy
•
8°C and over (14.4°F)
•
As specified.
•
Nothing wrong.
•
None.
•
8°C and over (14.4°F)
•
Higher than specified.
•
Nothing wrong, outdoor
temperature is too high, heat
radiation is not efficient.
•
Improve heat radiation.
•
Under 8°C (14.4°F)
•
Higher than specified.
•
Something is preventing heat
radiation.
•
Excessive amount of refrigerant.
•
Improve heat radiation.
•
Under 8°C (14.4°F)
•
Lower than specified.
•
Leakage of refrigerant or
refrigerant system is blocked.
•
Locate and repair leak.
•
Flush refrigeration cycle.
•
Under 8°C (14.4°F)
•
Higher than specified by
50%.
•
Compressor defect or
compressor capacitor defect.
•
Replace the compressor or
compressor capacitor.
Note: Room air humidity is relatively higher, the temperature difference will be smaller.
6 Troubleshooting Guide
Warning: Disconnect unit from electrical power supply before making any electrical checks.
Trouble
Check
Result
Cause
Remedy
Fan Motor and
Compressor won’t run.
•
Supply Voltage
•
Fuse Box or Circuit
Breaker.
•
Power cord or
Wiring Harness.
•
Thermostat Setting.
•
Less than 10% by
Rated.
•
Open Contacts.
•
Pulled loose or
Shorted.
•
Higher than room
temp.
•
Temporary or Permanent?
•
Customer Restarted unit
immediately without waiting
3 minutes.
•
Consult ELECTRICIAN, If
permanent.
•
Repair Open Circuit.
•
WAIT FOR 3 MINUTES.
•
Repair or Replace it.
•
Set it LOWER.
Fan Motor won’t run
(Compressor run).
•
Objects around
Fan.
•
RESISTANCE
between Wires.
•
Capacitor Fan
Motor.
•
Main Control
Switch.
•
Locked Fan.
•
Shorted / Open
circuit.
•
OHM Meter doesn’t
Deflect.
•
No contacts at
Position Shown.
•
Fan Hitting Cowling or
•
Foreign Materials.
•
Frozen Bearings.
•
Shorted or Burned out.
•
Capacitor Defect.
•
Main Control Switch defect.
•
Adjust Fan position setting
screw.
•
Remove Foreign Materials.
•
Replace Fan Motor.
•
Replace Fan Motor.
•
Replace Capacitor Fan.
•
Replace Main Control
Switch.
Compressor won’t run
(Fan run).
•
Thermostat setting.
•
RESISTANCE
between Terminal
and the
Compressor Body.
•
RESISTANCE
between Terminals.
•
Overload Protector.
•
Capacitor
Compressor.
•
Thermostat.
•
Main Control
Switch.
•
Higher than room
temp.
•
Shorted.
•
Shorted.
•
Infinity between
Terminals.
•
OHM Meter doesn’t
deflect.
•
No click heard.
•
No contacts at
Position Shown.
•
Winding Coil touched to the
compressor shell.
•
Rear Shorted or Burnt out.
•
Overload Protector defect.
•
Capacitor defect.
•
Thermostat defect.
•
Main Control Switch defect.
•
Set it lower.
•
Replace Compressor.
•
Replace Compressor.
•
Replace Overload
Protector.
•
Replace Capacitor
Compressor.
•
Replace Thermostat.
•
Replace Main Control
Switch.
6
CW-C180EF-W / CW-C240EF / CW-C180EF-M / CW-SC180EF
