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CW-C70YE / CW-C90YE
4 Refrigeration Cycle Diagram
4.1.
4.2.
CW-C70YE
Item
Pressure (MPa)
A
1.86 ~ 2.06
B
1.81 ~ 2.01
C
0.59 ~ 0.66
D
0.54 ~ 0.59
Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB).
5 Air Conditioner Performance Evaluation
Intake & Discharge Air
Temperature Difference
• 8°C and over (14.4°F)
• 8°C and over (14.4°F)
• Under 8°C (14.4°F)
• Under 8°C (14.4°F)
• Under 8°C (14.4°F)
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
Fan Motor and Compressor
won't run.
Temperature (°C)
70 ~ 85
31 ~ 41
8 ~ 14
13 ~ 21
Current Drain
• As specified.
• Higher than specified.
• Higher than specified.
• Lower than specified.
• Higher than specified by
50%.
Check
• Supply Voltage
• Less than 10% by
Rated.
• Fuse Box or Circuit
• Open Contacts.
Breaker.
• Power cord or
• Pulled loose or
Wiring Harness.
Shorted.
• Thermostat Setting.
• Higher than room
temp.
4.3.
CW-C90YE
Item
A
B
C
D
Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB).
Determination
• Nothing wrong.
• Nothing wrong, outdoor
temperature is too high, heat
radiation is not efficient.
• Something is preventing heat
radiation.
• Leakage of refrigerant or
refrigerant system is blocked.
• Compressor defect.
Result
Cause
• Temporary or Permanent?
• Customer Restarted unit
immediately without waiting
3 minutes.
4
Pressure (MPa)
Temperature (°C)
1.96 ~ 2.22
1.91 ~ 2.06
0.56 ~ 0.63
0.50 ~ 0.56
Remedy
• None.
• Improve heat radiation.
• Excessive amount of refrigerant.
• Improve heat radiation.
• Locate repair leak.
• Flush refrigeration cycle.
• Replace the compressor.
Remedy
• Consult ELECTRICIAN, If
permanent.
• Repair Open Circuit.
• WAIT FOR 3 MINUTES.
• Repair or Replace it.
• Set it LOWER.
71 ~ 89
35 ~ 45
7 ~ 12
6 ~ 14
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