TECH - SPEC'S Technician's Pocket Guide - Hoshizaki America, Inc.

not starting freeze cycle, check defrost
completion timer adjustment, thermistor for open
circuit, discharge line temperature, C efficiency,
and if HGV is fully open.
C) Freeze cycle – C remains energized, PM, (LV
on RS model), and FM energize…WV & HGV
de-energize. Unit is held in freeze by 5 minute
short cycle protection timer. After 5 minutes
freeze cycle operation to transferred to FS for
freeze termination. During first 5 minutes of
freeze, confirm that evaporator temperature
drops. After 7 minutes in freeze, remove black
FS lead from K5 connector…Unit should
immediately switch to pump out cycle.
Diagnosis: If evaporator is not cold, check for HGV
still open, TXV not opening properly, WV
continuing to fill reservoir, improper unit pres
sures, and inoperative C. If unit remains in freeze
with FS removed replace board. * Normal freeze
cycle will last 20 ~ 40 minutes depending on
model and conditions. Cycle times and
pressures should follow performance data
provided in Tech –Specs.
D) Pump Out Cycle – (10/20 second pump out)
C remains energized, HGV energizes, FM deenergizes,
PM stops for 2 seconds and starts in
reverse rotation for 10/20 seconds.( This
removes contaminants from the water reservoir
through check valve and down the drain and
allows for power flush of FS.) Check clear
tubing at check valve housing or unit drain for
water flow.
Diagnosis: If PM does not reverse, check PM circuit
and capacitor. If water does not pump out,
remove housing and check/clean valve
assembly.
E) Normal Harvest Cycle –same as Initial Harvest
Cycle – Return to B)…* Unit continues to cycle
through B)…C)…& D) (Setting can be adjusted
to skip D until every 2, 5, of 10 cycles)…until bin
control is satisfied or power is switched OFF.
• Unit always restarts at A).
Legend:
C – Compressor CC – Contactor Coil FM – Condenser Fan Motor
FS – Float Switch HGV – Hot Gas Valve LV – Line Valve
PM – Pump Motor RS – Remote System WV – Inlet Water Valve
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2/20/03