Hoshizaki AMERICA 73183 - Manual (Page 38)

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D. Alarm Safeties
Alarm signals are designed to protect the appliance and food product. These alarms
give information or warnings in the event the appliance is operating out of acceptable
parameters. Should one of the alarms occur, follow the instructions in the table below
to address the alarm. The alarm code flashes once every second with audible alarm. To
silence the alarm, press and release the upper button.
1. Control Module with Remote Display Module
Alarm Signals
Alarm Code Problem Corrective Action/Reset Details
E1
Cabinet Thermistor Malfunction Alarm
Cabinet thermistor has failed. Cabinet thermistor disconnected, shorted, or open.
Check connection and continuity. Reconnect or
replace as needed.
Unit cycles 5-min. on, 5-min. off.
E2
Defrost Thermistor Malfunction Alarm
Defrost thermistor has failed. Defrost thermistor disconnected, shorted, or open.
Check connection and continuity. Reconnect or
replace as needed.
Unit cycles on and off with cabinet thermistor.
UHi
High-Voltage Alarm (135VAC ± 5% or
more)
The compressor de-energizes if voltage protection
operates. The voltage safeties automatically reset
when voltage is corrected.
ULo Low-Voltage Alarm (96VAC ± 5% or less)
Hi
High-Temperature Alarm
Note: When power is turned on, a
high-temperature alarm may occur.
Refrigerator: Cabinet temperature has
exceeded the setpoint temperature by
10°F (5.6°C) for more than 2 hr.
Freezer: Cabinet temperature has
exceeded the setpoint temperature by
27°F (15°C) for more than 2 hr.
First try obvious corrections such as closing doors
and cleaning the condenser.
Automatically resets when temperature returns to
normal.
Lo
Low-Temperature Alarm
Refrigerator & Freezer: Cabinet
temperature has remained below the
setpoint temperature by 8°F (4.4°C) for
more than 2 hr.
Automatically resets when temperature returns to
normal.
E13
Communication Error Alarm
Communication between the control
module and the display module has been
interrupted or disconnected.
Check the connections at the control module
and the display module. If connections are good,
the control module and display module must be
replaced.
The unit operates on a set 5-min. on, 5-min. off cycle
until communication is restored.
"– – –"
Compressor Off Unit (compressor) off.
Press and hold the upper and lower buttons until the
temperature appears on the display.