38
Code Error
Condition Operation
Reset
Check/Repair
En
Low Voltage
Sensing
Transformer
Circuit Open
Low voltage sensing
transformer circuit is
open.
Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Low voltage sensing
Transformer
EU
Controller Board
Error
Controller board IC fails.
Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Replace controller board.
None
Electric Leak
Short Circuit
Electric leak or
overcurrent.
Whole unit
stops.
Power supply,
Turn OFF -
Turn ON
Replace fuse
Electric leak, fuse
Non-Interlock Errors
Code Error
Condition
Operation
Reset
Check/Repair
CM
Time
“- -”
Microcomputer
Read/Write
Error
Microcomputer fails to
read/write properly.
Memory circuit
not available.
Replace
controller board.
Error records and
compressor
operating hours not
available on display
c0
Icemaking
Water Leak
After initial water supply,
float switch trips at lower
float level within 5 minutes
after gear motor starts and
before compressor starts.
Whole unit stops.
Flush water
valve turns ON
for 1 second,
then turns OFF.
Unit restarts.
Error record only.
Water leak from
water circuit
(reservoir, hoses,
mechanical seal,
flush water valve),
float switch
c1
Low Water
Water supply continues for
more than 90 seconds, or
float switch trips at lower
float level and does not
reset for more than 60
seconds after water
supply.
Whole unit stops
until reservoir fills
up. Only control
water valve
operates
intermittently for
5 minutes.
Automatically
resets after
reservoir fills up.
Water supply
interruption, control
water valve not
opening, flush
water valve not
closing, float
switch, water leak
c2
Abnormal High
Side Pressure
Pressure switch stays
OFF for 5 seconds or
condenser thermistor
reads higher than set point
for 5 seconds.
Whole unit stops.
Automatically
resets after
pressure switch
turns ON or
condenser
thermistor reads
lower than set
point.
Condenser
clogged, cooling
water circuit,
refrigeration circuit
c3
Abnormal Low
Voltage
Voltage stays below
setting for more than 1
second with compressor
ON and control water
valve OFF.
Whole unit stops.
Automatically
resets after
voltage stays
above reset
setting for 2
minutes.
Supply voltage
c4
Drain Error
Float switch trips at upper
float level in 10 minutes
after flush water valve
turns ON.
N/A
Error record only.
Flush water valve
not opening, control
water valve not
closing
Rotation rate reduces.
c5
Gear Motor
Error
While gear motor is
running, voltage detection
signal is not input to
controller board.
Whole unit stops.
Automatically
resets after 30
minutes.
Gear motor
overloaded
c7
Evaporator
Outlet
Temperature
Decrease
Evaporator outlet
temperature decreases.
Indication only.
Automatically
resets.
Evaporator inside
not clean, extruding
head not clean,
heater circuit open
Summary of Contents for FM-300AKE-HC
Page 4: ...1 I SPECIFICATIONS 1 DIMENSIONS SPECIFICATIONS a FM 300AKE HC Auxiliary code D 0 or earlier ...
Page 5: ...2 b FM 300AKE HC Auxiliary code D 1 or later ...
Page 6: ...3 c FM 300AKE HCN Auxiliary code D 0 or earlier ...
Page 7: ...4 d FM 300AKE HCN Auxiliary code D 1 or later ...
Page 8: ...5 e FM 480AKE HC Auxiliary code D 0 or earlier ...
Page 9: ...6 f FM 480AKE HC Auxiliary code D 1 or later ...
Page 10: ...7 g FM 480AKE HCN Auxiliary code D 0 or earlier ...
Page 11: ...8 h FM 480AKE HCN Auxiliary code D 1 or later ...
Page 21: ...18 2 WIRING DIAGRAM a WIRING DIAGRAM FM 300AKE HC N Auxiliary code D 0 or earlier ...
Page 22: ...19 FM 300AKE HC N Auxiliary code D 1 or later ...
Page 23: ...20 FM 480AKE HC N Auxiliary code D 0 or earlier ...
Page 24: ...21 FM 480AKE HC N Auxiliary code D 1 or later ...
Page 33: ...30 b TIMING CHART ...