RS COMPACT FREEZE TUNNEL, Руководство по эксплуатации и обслуживанию

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OPERATION & MAINTENANCE MANUAL
CompactFreezer
37
10.4. TROUBLSHOOTING TABLE
TROUBLE PROBABLE CAUSE REMEDY
LN2 vapor flowing over
exhaust troughs Exhaust blower not operating
or wrong rotation Check blower and correct cause
Clogged exhaust pipe or full
blast gate in piping Check and correct cause
Too much air drawn in from
opposite end of freezer Check curtain. Check directional
baffle
Negative pressure of room
Room needs positive pressure (bring
in make‐up air)
If exhaust (entrance) opening
is blocked at top (conveyor,
etc.) Loosen thumb screw to lower
opening by dropping slide plate
adjust
Uneven draw across belt
(entrance & exit) Adjust slope baffle at bottom, by
reversing of changing open draw
area
Exhaust system failure Check the exhaust system (motor,
blades, shaft, etc.) and replace if
necessary.
Both AMBER and RED lights
shut‐off (during production
runs)
Over injection of LN2 Reduce number of nozzles in sensor
area
Valve may need throttling
Reduce pressure of tank
Injection too close to sensor Change location of nozzle
Ice build‐up around nozzle
causing direction of spray to
sensor area
Clean ice off nozzle
Both AMBER and RED lights
stay on continuously, but
freezer cannot maintain
temperature
Not enough nozzles Add nozzles
Valve throttled too much Re‐adjust valve
Insufficient cooling in freezer Lack of LN2 Check tank, piping, valves, strainer.
or freezer will not maintain Correct cause. Check solenoid valves
set point temperature Tank empty of liquid for proper functioning. Correct
cause or replace parts if necessary.
Solenoid valve(s) turned off. Refer to Maintenance Section.
Strainer plugged.
Header orifices plugged
Clean headers. See Maintenance
Section
Temperature controller or
sensing element Refer to Manual on controller.
Check settings, sensing element, its
wiring and controller. Correct cause
or replace sensing element to
controller, if necessary
Suction of room air into Reset adjustable baffle(s). Repair