OPERATION & MAINTENANCE MANUAL
CompactFreezer
39
TROUBLE
PROBABLE CAUSE
REMEDY
Product exits freezer too
warm at start‐up
of
production.
Freezer not sufficiently cooled
down.
Wait a few more minutes before
correcting.
Steady state not reached.
Product residence time too
short.
Reduce belt speed.
No LN
2
‐injection.
Check if all valves are open and
working properly.
No power at control panel or
components.
Main disconnect not switched
on.
Turn main disconnect into
ON
position.
Main fuses failed.
Identify cause and replace if
required.
Power supply of plant failed.
Check power supply up‐stream
of
machine.
Product exits freezer too cold.
Product residence time too
long.
Increase the belt speed.
Exhaust fan not running
Exhaust system not switched
on.
Activate exhaust system.
Circuit breaker of motor
failed.
Reset breaker.
No LN
2
‐injection.
LN
2
‐injection not
activated.
Start LN
2
‐injection.
Tank is empty.
Re‐order.
Main shut‐off valve at
storage
tank closed.
Open main shut‐off
valve.
Emergency stop pushed.
Pull the e‐stop
button.
Exhaust fan not activated.
Activate exhaust fan.
Machine not closed. Proximity
switch not activated.
Close Machine
Replace proximity switch.
Various drive units (belt, fans)
not activated.
Make sure all drive units have been
activated and are properly working.
Nozzles
of spray
header
blocked.
Remove spray header and nozzles
and clean.
Commented [D1]:
Exhaust fan fuse blown … this happened at
JD Sweid Daniel: Yes, we now use breakers - so the solution would
be to re-set the breaker. There are also re-set buttons on the
motor starter that could be a solution.
