Eppendorf New Brunswick -86 °C Freezers Innova U360 - Manual (Page 36)

Innova® U360 -86 °C Freezers — Operating manual
36
Symptom/message Cause Remedy
HIGH CONDENSER
TEMP CHECK AIR
FILTER Air-cooled condenser
temperature too high:
1. Filter may be blocked.
2. Ambient temperature may be
too high.
If alarm continues to sound:
• Fan may have failed.
1. Clean filter according to the
instructions (see Air intake
grille and filter on p. 31).
2. Cool the room.
 Call New Brunswick Service
department.
HIGH CONDENSER
TEMP CHECK ROOM
TEMP Air-cooled condenser
temperature too high:
1. Ambient temperature may be
too high.
2. Freezer airflow may be
blocked or heated air from
other equipment is being
drawn into the freezer’s air
intake.
If alarm continues to sound:
• Fan may have failed.
1. Reduce the room
temperature.
2. Remove restrictions to air flow
and make sure no other
equipment is forcing hot air
into the freezer intake.
 Call New Brunswick Service
department.
EXCESSIVE
CONDENSER TEMP
THERMAL OVERLOAD
FREEZER WILL
REMAIN OFF UNTIL
SYSTEM COOLS Freezer will automatically shut
down if critical condenser
temperature is reached to avoid
system damage. Thermal fuse will automatically
reset after system cools.
HIGH CASCADE
TEMPERATURE A high cascade condenser
temperature may indicate a
refrigeration problem. Call New Brunswick Service
department.
HIGH AMBIENT
TEMPERATURE Room temperature has
exceeded 34 °C. If room
temperature is not reduced, it
may affect freezer performance. Reduce room temperature
LOW AMBIENT
TEMPERATURE Room temperature has dropped
below 10 °C. If room
temperature is not increased,
low ambient temperature may
affect performance. Increase room temperature
8
Troubleshooting