Hoshizaki KM-40C-HC Service Manual page 31

n32 LED error
Fully automated
n33
cleaning error
n70 Low water
High temperature
n92
error 2
Empty chemical
n93
pack
n99 Maintenance
Service Diagnosis
Code Check
E31 LED thermistor
E40 Control board
E41 Control board
Fan motor
Fan motor relay
E46
Water regulator (water-
cooled model only)
Hot gas valve
Hot gas valve relay
Water valve
Water valve relay
Refrigeration circuit
Compressor
E60
Compressor relay
Condenser
Fan motor
Fan motor relay
Hot gas valve
Hot gas valve relay
Evaporator thermistor
LED temperature fails to rise.
Water circuit fails to flush properly.
Float switch fails to close at lower
float level four times in a row when
checked every minute in fill cycle.
Control board thermistor reads set
point or higher temperature for 10
seconds.
Fully automated chemical cleaning
is repeated more than set number of
times.
Time for maintenance.
Possible Cause
Open circuit
Short circuit
Connector disconnected
EEPROM defective
EEPROM defective
Locked
Broken fan
Coil circuit open
Low water
Opening failure
Coil circuit open
Closing failure
Bad contacts
Gas leak
Clogged capillary
Clogged expansion valve
Defective
Starting failure
Coil circuit open
Clogged
Locked
Broken fan
Coil circuit open
Closing failure
Bad contacts
Disconnected
Continue
Continue
Halt
Continue
Continue
Continue
Replace
Replace
Reconnect
Replace
Replace
Replace
Replace fan
Replace
Check water tap
Replace coil or valve
Replace
Clean or replace
Replace
Repair
Replace
Replace
Replace
Check supply voltage or replace
electrical components
Replace control board
Clean
Replace
Replace fan
Replace
Replace
Replace
Reconnect
27
Replace LED
Turn off power
supply
Automatically reset
in 10 minutes (fill
cycle begins)
Read set point -
2°C for 10 seconds
Replace chemical
pack and press
reset button
Press reset button
Remedy