Safety Devices; Compressor External And Internal Overloads; Short-Cycle Protection; High-Pressure Switch - Hoshizaki Reach-In Instruction Manual

G. Safety Devices

1. Compressor External and Internal Overloads

If a combined temperature/amperage value is above the limit specified by the
compressor manufacturer, the compressor overload operates independently to turn
off the compressor. The compressor overload de-energizes the compressor until the
temperature/amperage value returns to an acceptable level.

2. Short-Cycle Protection

• There is a 2 1/2 minute minimum off-time and on-time for the compressor.
Note: Time may vary with compressor overload or high-pressure switch activation.

3. High-Pressure Switch

If pressure on the high-side of the unit exceeds Hoshizaki specifications, the
high-pressure switch activates and interrupts the compressor circuit (internal to control
board), de-energizing the compressor until the pressure returns to an acceptable level.
H. Alarm Safeties
This unit incorporates visual and audible alarm safeties built into the control board.
Should one of the alarms occur, follow the instructions in the table below to address the
alarm. The alarm code and the cabinet temperature are displayed in 2-second intervals
in the display window when an alarm occurs. An audible alarm also sounds until the error
is corrected and/or the control board is reset.
Alarm No. of Beeps
Code (every 10 sec.) Problem
E1 3
E2 4
Alarm Signals
High Temperature Alarm
Refrigerator: Cabinet temperature
has exceeded set temperature by 10°F
(5.6°C) for more than 2 hours.
Freezer: Cabinet temperature has
exceeded set temperature by 25°F
(13.9°C) for more than 4 hours.
Low Temperature Alarm
Cabinet temperature has remained below
the setpoint temperature by 8°F (4.4°C)
for more than 1 hour.
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Reset Options
Press the "RESET" button.
If temperature has returned to the
setpoint range, alarm will be silenced
and "E1" clears.
If the temperature has not returned
to the sepoint range, the alarm is
silenced for 5 minutes and "E1"
continues to flash.
If obvious corrections such as closing
doors and cleaning the air filter and/
or condenser do not bring cabinet
temperature back in range, call a
qualified service technician.
Press the "RESET" button.
If the temperature has returned to
the setpoint range, the alarm will be
silenced and "E2" clears.
If the temperature has not returned
to the setpoint range, the alarm will
be silenced for 5 minutes and "E2"
continues to flash.
If obvious corrections do not bring
the temperature back in range, call a
qualified service technician.