Service Diagnosis; Error Code Indication - Hoshizaki IM-30CWNE Service Manual

VI. SERVICE DIAGNOSIS

1. ERROR CODE INDICATION

* See the controller board service manual for detailed diagnosis and remedies.
* The error and caution codes other than E1 and E2 are indicated as "EE" in the 7-segment
display at the time of occurrence. But the error history is recorded as the actual error
codes in parenthesis, and a maximum of five errors are indicated from the latest entry.
Error Item
E1 Freeze error
E2 Defrost error
EE Water pan
(E3) opening error
EE Water pan
(E4) closing error
High
EE
temperature
(E5)
error
EE Condenser
(E9) thermistor error
EE
Data error
(EA)
EE Cube control
(EC) thermistor error
EE Water regulator
(Ed) error
Caution Item
EE
High pressure
(C2)
Description
Freeze backup timer (45/60 minutes)
counts up before freeze cycle completes,
and evaporator temperature is 0°C or
higher.
Defrost backup timer (30 minutes)
counts up before defrost cycle
completes.
Water pan has not fully opened within 60
seconds, and 3 minutes have passed
even with opening failure control.
Unit resumes operation after 60 minutes
and repeats the above error.
[Controller board before ver. 1.6A]
Water pan has not fully closed within 60
seconds, and 3 minutes have passed
even with closing failure control.
[Controller board ver. 1.6A and later]
Water pan has not fully closed within 50
seconds, opened and started to close
again, but failed to close fully within 50
seconds.
Unit resumes operation after 60 minutes
and repeats the above error.
Evaporator temperature stays 60°C or
higher for 5 seconds or more.
Condenser thermistor circuit is open or
shorted for 2 seconds.
Model setting data memory IC is
defective.
Cube control thermistor circuit is open or
shorted for 2 seconds.
Cooling water cannot stop by water
regulator error, and thermistor senses
set point or lower temperature.
Description
[Air-cooled] Condenser thermistor
senses 63°C or higher temperature.
[Water-cooled] Pressure switch senses
2.65MPa or higher pressure.
Shut down
Shut down
Halt
Shut down
Halt
Shut down
Shut down
Shut down
Shut down
Shut down
Continue
Compressor
stops
60
Operation Reset
Press reset switch
Press reset switch
Press reset switch
Press reset switch
Press reset switch
Replace
thermistor
Replace controller
board
Replace
thermistor
Press reset switch
Operation Reset
After 5 minutes,
condensing
temperature 50°C
or lower, pressure
1.96MPa or lower