Hoshizaki HR24A User Manual
17
G. Alarm Safeties
The alarms are designed to protect the appliance and the items inside. These alarms
give information and warnings in the event the appliance is operating out of acceptable
parameters. For all alarms except Pr1, the alarm icon turns on and the alarm code
alternates with the cabinet temperature. If the Pr1 alarm occurs, only Pr1 and the alarm
icon are displayed.
give information and warnings in the event the appliance is operating out of acceptable
parameters. For all alarms except Pr1, the alarm icon turns on and the alarm code
alternates with the cabinet temperature. If the Pr1 alarm occurs, only Pr1 and the alarm
icon are displayed.
Alarm Signals
Alarm Code Problem
Corrective Action/Reset Details
AH
High Temperature Alarm
Cabinet temperature has exceeded the
setpoint temperature by 10°F for more
than 2 hours.
setpoint temperature by 10°F for more
than 2 hours.
If obvious corrections such as closing the door and
cleaning the condenser do not bring temperature
back in range, see "IV. Service Diagnosis."
cleaning the condenser do not bring temperature
back in range, see "IV. Service Diagnosis."
Automatically resets when temperature returns to
normal. Alarm icon flashes until reset manually.
normal. Alarm icon flashes until reset manually.
AL
Low Temperature Alarm
Cabinet temperature has remained below
the setpoint temperature by 10°F for more
than 2 hours.
the setpoint temperature by 10°F for more
than 2 hours.
If obvious corrections do not bring the temperature
back in range, see "IV. Service Diagnosis."
back in range, see "IV. Service Diagnosis."
Automatically resets when temperature returns to
normal. Alarm icon flashes until reset manually.
normal. Alarm icon flashes until reset manually.
Ld
Door Open
Close the door.
Pr1
Cabinet Thermistor Malfunction Alarm
Cabinet thermistor has failed.
Compressor and evaporator fan motor cycle 10 min.
on, 10 min. off.
on, 10 min. off.
a) High and Low Temperature Alarm Values (AH or AL)
If an AH or AL alarm occurs, follow the steps below to acquire alarm details.
1) Press the "-" button for 3 sec. to enter the alarm menu. "EnS" is displayed.
2) Press the "+" button once. "LS" is displayed.
3) Press the "P" button. The alarm code is displayed.
4) Press the "P" button again and the alarm details are displayed in 2 second increments.
2) Press the "+" button once. "LS" is displayed.
3) Press the "P" button. The alarm code is displayed.
4) Press the "P" button again and the alarm details are displayed in 2 second increments.
AH or AL Alarm code
XX°F The highest or lowest temperature during the alarm
dur Alarm duration
h01 Hours alarm has been engaged
n15 Minutes alarm has been engaged (continuance of h01)
XX°F The highest or lowest temperature during the alarm
dur Alarm duration
h01 Hours alarm has been engaged
n15 Minutes alarm has been engaged (continuance of h01)
To review, press the "P" button again.
To exit, press the on/off button twice. After pressing the on/off button the first time, "LS"
is displayed. After pressing the on/off button the second time, the display returns to the
alarm code display.
is displayed. After pressing the on/off button the second time, the display returns to the
alarm code display.