Envicool XRow Series - Chapter 8 Troubleshooting

Shenzhen Envicool Technology Co., Ltd.
69
Chapter 8 Troubleshooting
Failures
Causes
Check or maintenance
The
equipment
does not start
up.
The equipment is not connected to
power supply.
Check the voltage of air switch of the unit.
Remote startup and shutdown positions
are incorrect.
Check whether the cable of remote startup and
shutdown ports of electric control box gets
loose.
Control panel does not display
“refrigeration” command.
Regulate the temperature control set value to
the refrigerating temperature.
The
equipment
does not
refrigerate or
refrigerating
effect is
poor.
Startup interval is too short.
Control program controls the delay time of
compressor’s shutdown and startup to be 3
minutes.
Compressor contactor has poor contact.
Check the contactor.
The discharge pressure of compressor
is too high.
Refer to 5.1.1 instructions for high pressure
alarm.
Dry filter is blocked.
Replace dry filter.
Refrigerant is filled little.
Check condensate depression of pressure and
liquid pipe. Under low temperature, sufficient
refrigerant is very important to
low-temperature startup subassemblies.
The air volume for condenser coil is
insufficient.
Clear the coil or impurities entering into air
inlet.
Compressor
condensation
Too high
pressure
Insufficient air flow in condenser coil.
Increase the humidification control set value
and sensing value to make the system require
humidification.
The outdoor unit fan does not turn.
Check fan motor voltage, fan speed controller
output and fan operation.
Humidifier
not
humidified
The "Humidification" command is not
displayed on the control panel.
Increase the humidification control set value
and sensing value to make the system require
humidification.
Defective cable board or humidifier
cable board.
Check the cable connection or replace the
interface board. Check the cable connection
between the control board and the humidifier
circuit board.