Service Manual

14
C. Controller Check
Before replacing Controller that does not show a visible defect and that you suspect is bad,
conduct the following check procedure. This procedure will help you verify your diagnosis.
Always choose a neutral (W) to establish a good neutral connection when checking high
voltages. Also, conrm there is a good power supply and neutral connection to Controller:
115VAC.
Alarm signals are designed to protect the appliance and items inside. These alarms give
information or warnings in the event the appliance is operating out of acceptable parameters.
Should one of the alarms accur, follow the instructions below to address the alarm. The alarm
icon appears on the display and the alarm code alternates with the cabinet temperature.
For high temperature, low temperature, and door alarms, the appliance beeps in addition to
displaying the alarm icon and alarm code.
Note: The sound alarm can be turned off by pressing the red button
”set mute” on the right side of the display.
In case the alarm is not turned off by the actions suggested, or you
have any questions regarding the cooler performance, please contact
Hoshizaki Technical Support.
CONTROLLER DISPLAY
If the cabinet temperature is displayed, the cooler is working
properly; if an alarm code is displayed, see the information below
ALARM
INDICATES
WHAT TO DO?
DEFROST SELECTOR
Sound alarms off
set
m
u
t
e
Probe 1 error= control
Low temperature alarm
High temperature alarm
Defrost running
Check if the cabinet thermistor is loose
Wait a few minutes to see if the
alarm ends, if the alarm persists,
see “II.B.1. Troubleshooting”
Check if the compressor is running,
wait a few minutes to see if the alarm
ends, if the alarm persists, see
“II.B.1. Troubleshooting”
Wait for the defrost to finish
EO
LO
I
F
H
Alarm Indicators