4.2. CW-C70YE
Item Pressure (MPa) Temperature (°C)
A 1.86 ~ 2.06 70 ~ 85
B 1.81 ~ 2.01 31 ~ 41
C 0.59 ~ 0.66 8~14
D 0.54 ~ 0.59 13 ~ 21
Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB).
4.3. CW-C90YE
Item Pressure (MPa) Temperature (°C)
A 1.96 ~ 2.22 71 ~ 89
B 1.91 ~ 2.06 35 ~ 45
C 0.56 ~ 0.63 7~12
D 0.50 ~ 0.56 6~14
Note: Indoor temperature at 27°C (DB), 19°C (WB) and Outdoor at
35°C (DB), 24°C (WB).
4 Refrigeration Cycle Diagram
4.1.
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 repair leak.
• Flush refrigeration cycle.
• Under 8°C (14.4°F) • Higher than specified by
50%.
• Compressor defect. • Replace the compressor.
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.
4
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