Hoshizaki 1800ALKE(-N), Service Manual

Page: 113 / 148

109
7. ERROR CODES
Interlock Errors
Code Error Condition Operation Reset Check/Repair
E0
Icemaking Water
Leak c0 error occurs 2 times in
a row. Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Water leak from water
circuit (reservoir, inlet
hose, outlet hose, hose
joint, mechanical seal,
flush water valve), float
switch
E1
Low Ice
Production Icemaking cycle takes too
long. Whole unit
stops.
Power supply,
Turn OFF -
Turn ON Gas leak, control water
valve not closing, vapor
lock, freeze, float switch
E2 Float Switch Error
With flush water valve
OFF, float switch trips at
both upper and lower float
levels for 2 seconds.
Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Float switch
E3
Gear Motor Error
or Gear Motor
Sensor Circuit
Open
Gear motor is ON with
rotation sensor or current
sensor circuit open.
Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Rotation sensor, current
sensor
Gear motor relay is ON
with gear motor protective
circuit detector OFF. Gear motor protective
circuit (TPO, overload,
etc.), gear motor relay
E4
Abnormal High
Side Pressure
c2 error occurs 5 times in
1 hour of compressor
operation.
E4 blinks. N/A
Fan motor, cooling water
circuit, refrigeration
circuit, condenser
clogged, water supply,
installation conditions
E5
Gear Motor Drive
Element Error
Gear motor is OFF on
controller board while
rotation sensor signals
gear motor rotation or
current flows.
Whole unit
stops.
Power supply,
Turn OFF -
Turn ON Miswiring, gear motor
magnet switch or relay
Replace controller board.
Gear motor relay is OFF
with gear motor protective
circuit detector ON.
E8
Discharge Pipe
Temperature
Error
Discharge pipe
thermostat is OFF. Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Gas leak, compressor
cooling fan failure
EA
Water Thermistor
Circuit Open Water thermistor circuit is
open.
EA blinks. N/A Water thermistor
Eb
Condenser
Thermistor Circuit
Open
Condenser thermistor
circuit is open. Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Condenser thermistor
EC
Evaporator Outlet
Thermistor Circuit
Open
Evaporator outlet
thermistor circuit is open. Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Evaporator outlet
thermistor
EE Gear Motor Error
Rotation sensor detects
reversing. Whole
unit
stops.
Power supply,
Turn OFF -
Turn ON
Gear motor locked,
hunting or overloaded,
supply voltage, high
ambient temperature
c5 error occurs 5 times.
EF
Abnormal Low
Voltage c3 error occurs 3 times in
24 hours. Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Supply voltage
EH
Discharge Pipe
Thermistor Circuit
Open
Discharge pipe thermistor
circuit is open.
EH blinks. N/A Discharge pipe thermistor
EL
Bin Control
Switch Error Bin control protective
switch trips. Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Bin control switch