EAS Electric VRV EVR Series Instruction Manual page 44

Table 6-1
Symptoms
Unit does not start
Air flowing normally but can't
cool completely
Units start or stop frequently
Low cooling effect
Low heating effect
Causes
Power failure.
Power switch is off.
Fuse of power switch may have burned.
Batteries of remote controller exhausted
or other problem of controller.
Temperature is not set correctly.
Be in 3 minutes protection of
compressor.
Refrigerant is too little or too much.
Air or no concreting gas in the
refrigerating circuit.
Compressor is malfunction.
Voltage is too high or too low.
System circuit is blocked.
Outdoor unit and indoor unit heat
exchanger is dirty.
The air filter is dirty.
Inlet/outlet of indoor/outdoor units is
blocked.
Doors and windows are
Sunlight directly shine.
Too much heat resource.
Outdoor temp. is too high. Leakage
of refrigerant or lack of refrigerant.
Outdoor temperature is lower than 7ºC
Doors and windows not completely
closed.
Leakage of refrigerant or
refrigerant.
6
Solution
Wait for the comeback of power.
Switch on the power. ReplLocation:
Replace the batterises or check the
controller.
Set the temperature properly.
Wait.
Check leakage, and rightly recharge
refrigerant.
Vacuum and recharge refrigerant.
Maintenance or change compressor.
Install manostat.
Find reasons and solution.
Clean the heat exchanger.
Clean the air filter.
Eliminate all dirties and make air
smooth.
Close doors and windows.
open
Make curtains in order to shelter from
sunshine.
Reduce heat source.
AC cooling capacity reduces (normal).
Check leakage and rightly recharge
refrigerant.
Use heating device.
Close doors and windows.
Check leakage
recharge refrigerant.
lack of
and rightly
V.2