Laird Nextreme Series, Руководство пользователя

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Alarm Criticality Alarm Description Cause Effect Action Required/ Troubleshooting
Compressor
condenser side
pressure
sensor failure
Red Compressor condenser
side pressure sensor is
not working properly
Compressor
condenser side
pressure sensor is
not working
properly
If this happens
during system
stat-up, unit
would not Run.
If this happens
while the
system is
running, then
the entire
system shuts
down.
Turn off the power switch to the unit
off. Wait 5 seconds to turn the
power switch on again and Run the
unit. If the problem persists, contact
LTS customer service.
Compressor
suction side
pressure
sensor failure
Red Compressor suction
side pressure sensor is
not working properly
Compressor
suction side
pressure sensor is
not working
properly
If this happens
during system
stat-up, unit
would not Run.
If this happens
while the
system is
running, then
the entire
system shuts
down.
Turn off the power switch to the unit
off. Wait 5 seconds to turn the
power switch on again and Run the
unit. If the problem persists, contact
LTS customer service.
Compressor
overload
Amber Compressor current
draw is higher than 28A
compressor speed is
limited on high side.
Clears at 26A and
normal control takes
place.
High ambient
temperature or
high heat load on
the unit
Compressor
speed is limited
to reduce the
current drawn
by the system
Check if the ambient temperature is
too high or above operating limits.
Check if the load on the system is
beyond the specified capacity for
specific operating temperatures.
After fixing above issue,
acknowledge the alarm. This will
clear alarm on the LCD screen.
If the problem persists, contact LTS
customer service.
Compressor
General Fault
Red Compressor controller
inputs faults detected by
it to the main control
board
Controller has
detected faults in
the compressor
operation such as
voltage, current,
temperature,
speed etc.
If this happens
during system
stat-up, unit
would not Run.
If this happens
while the
system is
running, then
the entire
system shuts
down.
Turn off the power switch to the unit
off. Wait 5 seconds to turn the
power switch on again and Run the
unit. If the problem persists, contact
LTS customer service.
C
oo
la
nt
Coolant supply
pressure high
Red Coolant supply pressure
is higher than 4.1 bar.
Alarm will reset after
pressure drops below
3.5 bar for pump option
ST1 selected in model
NRC5000 and default
pumps selection in
NRC2400, NRC1200.
For NRC5000 pump
option SC1, the alarm
set values is 3.5 and
reset value is 2.7, for
pump option SC2 the
alarm set values is 5.3
and reset value is 4 bar.
Possible blockage
in the coolant line
Entire system
stops running
Check if there are any blockages or
kinks on the coolant line.
Check to make sure all the valves
are open on customer installed
connections.
If the unit is equipped with a coolant
filter, check if the filter needs
replacement
After fixing above issue,
acknowledge the alarm on the LCD
screen. This will clear the alarm.
Now run the unit. If the problem
persists, contact LTS customer
service.
Coolant supply
pressure low
Red Coolant supply pressure
is lower than 0.5 bar.
Alarm will reset after
pressure is greater than
1 bar.
Possible leak in the
coolant line
Entire system
stops running
Check if there is any leakage on the
coolant line.
Check if the coolant level is low.
After fixing above issue,
acknowledge the alarm. This will
clear alarm on the LCD screen. Now
run the unit. If the problem persists,
contact LTS customer service.
Low fluid level Red Coolant fluid level is
low.
Possible leak in the
coolant line
Entire system
stops running
Check to see if the coolant level is at
the recommended level on the front
fill port. Add coolant if necessary
and acknowledge the alarm on the
LCD screen. This will clear the
alarm. Now run the unit. If the
problem persists, contact LTS
customer service.