Laird Nextreme Series, Manual

Page: 54 / 73

54
Troubleshooting
For troubleshooting, use the following:

Alarm status screen

Wiring diagram

Plumbing & Refrigeration Diagram

Troubleshooting table (below)
Issue Possible Cause Corrective Measures Clearance By
Unit does not start Power not applied. Electrical
connection not correct or no
mains connection
Check power supply and ensure proper
voltage in the line. Check connection,
insert mains plug.
Operator
Coolant level too low. Alarm
for low coolant will be active
Check coolant level and top off, if
necessary. Refer to Adding Coolant
Operator
Main switch not turned on Turn main switch on Operator
Unit running but
cooling capacity is
too low
Buckled or pinched coolant
hoses
Install the hoses with a larger radius to
avoid sharp bends.
Operator
Improperly placed unit Required clearance with the wall of the
unit. Refer to Installation Requirements .
Operator
Blocked Condenser Clean condenser. Refer to Cleaning the
Heat Exchanger.
Operator
Coolant level too low Check coolant level and top up, if
necessary. Refer t o Adding Coolant.
Operator
Disconnected coolant hoses Connect the coolant hoses. Refer to
Connecting the Coolant Hoses .
Operator
Dirty coolant filter Clean or replace filter. Refer to Replace
filter .
Operator
No flow in cooling circuit Refer to coolant high/low pressure alarm
condition or optional low flow alarm
condition.
Operator
Fan does not rotate Check to determine if the fan is rotating. Operator
Ambient air temperature too
high
Operate unit within allowable ambient
temperature range.
Operator
Refrigeration circuit not
working properly
Confirm that all alarm conditions are
cleared.
Operator
Noise Blocked cooling circuit Ensure that cooling circuit is not blocked. Operator
Dirty coolant filter Clean filter strainer. Refer to Replace
filter .
Operator
Blocked Condenser Clean condenser. Refer to Cleaning the
Heat Exchanger.
Operator