Midea LSBLG365/MCFN

Flooded type water cooled screw chiller (PCB Control) MCAC-CTSM-2012-11
61
degree of superheat
temperature is not low, but
there is still liquid flows
back to the compressor
unit
can be closed: the proportion coefficient increases to
30, integral time increased to 250 seconds,
differential time increased to 10 seconds
A plurality of refrigerator
and defrosting
Stagger the defrosting start time. If unable to stagger,
in the absence of the first two issues in the case, will
involve the refrigerated cabinet superheat setpoint
and at least 2 °C LowSH threshold increase
The valve is too large The replacement for the smaller valves
Liquid only at
start controller
(closed) when
returning to the
compressor
Parameter "start control
valve opening degree" set
too high
Reference to the evaporator cooling capacity and
rated capacity of the valve than check this parameter
value; necessary to reduce this value
Superheat
value is about
swing around
the set value,
and larger than
4 ° C
Condensing pressure
instability
Check the controller condenser settings, set the
parameter to the more "moderate" values (such as
increasing the proportion with or increasing the
integration time). Note: the need for stability,
including + / -0.5 bar changes. If this does not work
or can not change the settings,In the "oscillation"
system used in electronic expansion valve control
parameters
Even if the valve is set to
manual control (mean
value in the corresponding
position with the work), the
value remains stable
superheat
Check the cause of instability (such as the refrigerant
charge is less) and try to solve.
If not feasible, in the "oscillation" system used in the
electronic expansion valve control parameters
Will set the manual control
valve (in the position
corresponding to the
average work), the
superheat value is no
longer swing
First try to reduce the scale factor (30% to 50%) and
then increasing the integration time by the same
proportion. In any case, the recommended use of
stable system parameters
Superheat setting is too
low
Increase the superheat setting, check to make sure
superheat swing has been reduced or disappeared.
Set the start of 13 ° C,and then gradually reduce the
set value, to ensure that the system does not swing
again and the device temperature can be set to
control value
In the
evaporating
temperature
higher start-up
phase, the
evaporation
pressure is too
high
MOP protection disabled
or invalid
The MOP threshold is set to require saturated
evaporation temperature (high evaporation
temperature limit compressor) and MOP integration
time set between the National Cheng Kung
University in 0 (recommended for 4 seconds) to
activate the MOP protection. To make the protection
more sensitive, down MOP integration time low
Start system or transient
conditions, excess
refrigerant charge (for
refrigerator)
A "soft start", a time to start a facility or a group. If this
method is not feasible to reduce all the facilities of
the MOP threshold
Low start-up
phase
protection
function
activated (only
comes with the
Parameter "start control
valve opening degree" set
too low
Reference to the evaporator cooling capacity and
rated capacity of the valve than check this parameter
value; increase this value if necessary
tLAN or pLAN drive
configured not begin to
control the valve remains
Check tLAN / pLAN wiring. Check that the drive to
connect with the pCO application (if equipped)
properly manage the drive start signal. Check that