Howe Rapid Freeze Service Manual page 53

14 Trouble Shooting Chart
PROBLEM
random, with no specific
pattern. Leaves strips of
ice at upper end of drum,
some at lower end, etc.
No ice freezing on drum
and compressor short
cycles.
I Ice flaker makes ice
intermittently and
compressor short cycles.
VII Ice flakes too thin.
PROBABLE CAUSE
Freezing surface coated with hard
water deposits.
) Loss of refrigerant charge.
Dead power element on TXV.
Insufficient water supply to ice
flaker because:
Water supply line undersized.
Water supply less than 20 PSIG.
c) water filters clogged.
Evaporating Temp. too high
because:
TXV overfeeding, compressor
frosted.
b) EPR set too high.
Condensing unit not producing
rated capacity because:
Compression valves broken.
Condenser dirty. (Head press. too
high)
47
REMEDY
Clean evaporator with ice
machine cleaner to
remove deposits.
Inspect for and repair
leaks, charge to proper
refrigerant levels.
Replace power element.
Install water supply line
of proper size.
Consult factory.
Replace filters every 6
months or sooner if
necessary. (Back flushing
filter may temporarily
work until replacement
filters arrive.)
Pinch down TXV (close 2
turn at a time).
Adjust EPR for
evaporating temp.
between -5°F and -10°F.
(Freshwater)
(-30°F to -35° F for
seawater)
Repair/service
compressor/condensing
unit.
Clean fin coil (air cooled
unit) Clean tubes ( water
cooled units).