Midea LSBLG365/MCFN

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
62
compressor
equipment)
closed the drive is not in standalone mode
Configured as a
stand-alone mode, the
drive does not begin to
control the valve remains
closed
Check the digital input terminal. Check that when the
control signal input correctly when closed. Check
that the drive is in stand-alone mode
LOP protection disabled The LOP integration time is set to greater than 0
seconds
LOP protection invalid Ensure that the needs of the LOP protection
threshold in the saturation temperature of
evaporation (evaporation temperature and the rated
voltage corresponding to the temperature scale
switch between) and reduce the LOP integration time
Solenoid valve block Check the solenoid valve opens correctly, check the
electrical wiring and relay operation
Lack of refrigerant Check expansion valve upstream of the observation
hole no bubbles. To ensure proper cooling
temperature (greater than 5 ° C); or refrigerant filling
Valve connection error
(rotation in the opposite
direction) and is open
And manual control valve is completely closed or
open, to check the valve rotation. Once the valve is
fully open to allow heat decreased, and vice versa so
that the superheat values have increased. If the
valve is rotating in the opposite direction, check the
electrical wiring
Valves damaged or
connected incorrectly the
stator
The stator and the valve and disconnect the cable
connection, with ordinary measuring coil resistance
tester.
Two coil resistance should be around 36 Euro.
Otherwise, replace the stator. Finally, check the
cable connection to connect the drive
Valve can not open Started using the manual control valve fully open. If
the superheat value is still high, check the electrical
wiring and / or replace the valve
Control process
equipment due
to low and off
(only comes
with the
compressor
equipment)
LOP protection disabled The LOP integration time is set to greater than 0
seconds
LOP protection invalid Ensure that the needs of the LOP protection
threshold in the saturation temperature of
evaporation (evaporation temperature and the rated
voltage corresponding to the temperature scale
switch between) and reduce the LOP integration time
Solenoid valve block Check the solenoid valve opens correctly, check the
electrical wiring and relay operation
Lack of refrigerant Check expansion valve upstream of the observation
hole no bubbles. To ensure proper cooling
temperature (greater than 5 ° C); or refrigerant filling
Valve is too small Replaced with a larger valve
Valves damaged or
connected incorrectly the
stator
The stator and the valve and disconnect the cable
connection, with ordinary measuring coil resistance
tester.
Two coil resistance should be around 36 Euro.
Otherwise, replace the stator. Finally, check the
cable connection to connect the drive
Valve can not open Started using the manual control valve fully open. If
the superheat value is still high, check the electrical
wiring and / or replace the valve
Even if the
valve is fully
opened,
Solenoid valve block Check the solenoid valve opens correctly, check the
electrical wiring and relay operation
Lack of refrigerant Check expansion valve upstream of the observation