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High Cabinet Air Temperature: The audible alarm will sound and the display will read HI
CAb when the temperature inside the cabinet rises above a pre-programmed limit. The limit is
determined by the type of unit being operated (i.e.: refrigerator/freezer). To turn off the audible
alarm, press the alarm cancel button. The visual alarm text will continue to display until the
cabinet air temperature falls below the limit. If the temperature does not fall below the limit
within 5 minutes, the audible alarm* will sound again and an additional Call Service message
will display.
Possible Causes:
• Doors open for extended periods of time.
• Large amounts of hot product placed inside the cabinet.
• Condenser coil dirty.
• Cooling Compressor Failure. Call Service.
• Refrigeration Problems.
Low Cabinet Air Temperature: The audible alarm will sound and the display will read Lo
Cab when the temperature inside the cabinet falls below a pre-programmed limit. The limit is
determined by the type of unit being operated (i.e.: refrigerator/ freezer). To turn off the audible
alarm, press the alarm cancel button. The visual alarm text will continue to display until the
cabinet air temperature rises above the limit. If the temperature does not rise above the limit
within 5 minutes, the audible alarm will sound again and an additional Call Service message
will display.
Possible Causes:
• No product in unit.
• Failed sensors.
• Stuck Evaporator Relay.
Loss Of Power: The audible alarm will sound and the display will read ELE LOS, when the
unit regains power after an outage. To turn off the audible alarm and/or clear the visual text,
press the alarm cancel button.
Condenser Clean: The audible alarm will sound and the display will read “Clean Filter” when
discharge temperatures exceeds 140 degrees. As the load on the condenser decreases, the
alarm will turn off by itself. As the temperature on the condenser continue to rise, the audible
alarm will return until the problem has been eliminated.
NOTE: If discharge temperature rises above 160
0
F the compressor & condenser fan motor
will be switched off until the discharge temp falls below 140
0
F
Sensor Failures:
The audible alarm will sound and the display will read CAB SEN, COL SEN or DIS SEN when
that particular sensor has failed to operate. To turn off the audible alarm, press the alarm
cancel function of the sensor, the audible alarm will sound again in either 5 minutes or 24
hours.
NOTE: Test sensor in ice water.
VII. MICROPROCESSOR CONTROL (cont’d)
VII. b-ALARM EXPLANATIONS:
NOTE: Explanation of alarms assume the audible alarm style is set at a 3-second burst or a continuous audible alarm.
References to the audible alarm do not apply if the audible alarm style is set to OFF (Refer to page 16 for setting the
audible alarm style).