Laird Nextreme NRC400, Спецификация и руководство пользователя

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15. Alarms
*- Red : Critical with Stop, Amber : Notify, Green : Status
Alarm Criticality Alarm Description Cause Effect Action Required/ Troubleshooting
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.
Coolant supply
temperature
sensor failure Red Coolant supply
temperature sensor is
not working properly Coolant supply
temperature
sensor is not
working properly If this happens
during system
stat-up, unit will
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.
Coolant supply
high temp Red Coolant supply
temperature is too high If the coolant
supply temperature
is 50
⁰C and above
Entire system
stops running Check to see if the heat load is too
high. Reduce the heat load to see if
the temperature falls to 40
⁰C or
below. Now acknowledge the alarm
on the LCD screen. This will clear
the alarm. If the problem persists,
contact LTS customer service.
Coolant supply
high temp Δ Red Alerts the customer if
the coolant supply
temperature is not
within certain pre-
specified temperature
delta above the
temperature set point,
within a specified
amount of time after
starting the unit or
changing the set point High load on the
system than the
specified capacity
or ambient
temperature is too
high Unit alarms to
indicate
customer the
condition. Unit
continues
running.
Check if the ambient temperature is
too high or above operating limits.
If possible, check if the load on the
system is beyond the specified
capacity for specific operating
temperatures.
After fixing above issue,
acknowledge the alarm on the LCD
screen. This will clear alarm.
If the problem persists, contact LTS
customer service.
Coolant supply
low temp Δ Red Alerts the customer if
the coolant supply
temperature is not
within certain pre-
specified temperature
delta below the
temperature set point,
within a specified
amount of time, after
starting the unit or
changing the set point Hot gas bypass
heating loop is not
functioning
properly, or
ambient
temperature is too
low Unit alarms to
indicate
customer the
condition. Unit
continues
running.
Check if the unit has been sitting in
ambient temperature below the
specified operating temperature. If
so, move the system to
recommended operating ambient
temperature and wait for few
minutes for the system refrigerant to
warm up.
After fixing above issue,
acknowledge the alarm on the LCD
screen. This will clear alarm.
If the problem persists, contact LTS
customer service.
S
e
lf
-T
e
s
t
Self-Test Red Controller checks
whether all the sensors
are functioning properly
after the power switch is
turned on Sensors not
connected properly
or component
failure System would
not Run if self-
test fails Check if there are any other alarms
listed in the alarms page of the LCD
screen along with this alarm. Check
if those issues can be resolved
using the guidelines above. After
fixing the 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.
C
u
rr
e
n
t
a
la
rm
s
High pump
current
Red Controller checks if the
pump current exceeds
2.5A Blocked coolant
line, locked
impeller or rotor Entire system
stops running Check to make sure there is no
blocked coolant line.
After fixing the 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.