Air innovations HEPAir 24S050, Инструкция по установке, эксплуатации и обслуживанию, Страница: 46 / 51

46
Advanced Troubleshooting
A. High Discharge Pressure
Possible Causes Recommended Action
Dirty condenser or filter Clean coil; clean or replace filter
Condenser air path restricted Check and remove obstruction
Refrigerant overcharge
Remove excess refrigerant slowly. Normal sub-
cooling is 10 degF
Condenser fan motor not running or blade
damaged Check and replace defective parts. See wiring
schematic and parts list
Condenser air Inlet temperature too high
Ensure condenser air outlet space in
adequately vented
B. Low Discharge Pressure
Possible Causes Recommended Action
Refrigerant shortage Repair leak and re-charge
Damaged compressor discharge valves Check and replace compressor
Restricted expansion valve Check and replace
Air too cold entering condenser
Preheat condenser air, Reduce condenser airflow
volume
Frost on evaporator co
il
May need to adjust factory setting of HGBV.
Check evaporator airflow volume
C. Excessive Noise or Vibration
Possible Causes Recommended Action
Refrigerant overcharge Check and recharge
Fan blade Imbalance Check and replace
Broken compressor part
s
Check compressor for knocking and replace if
required
Expansion valve stuck open Check and replace valve
Excessively low suction line temp
Check and adjust superheat. Nominal superheat 10
degrees
Loose component
Check system components for tightness or
interference.
Adjust as required