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LOW DISCHARGE TEMPERATURE ALARM LIMIT
1. An optional discharge air sensor is required. If the optional discharge air sensor is not installed, the setting in sub-
menu 4-7, will automatically read “SENSOR NOT INSTALLED ON THIS UNIT”.
2. The low discharge temperature alarm limit is set and/or disabled through sub-menu 4-7.
3. If the alarm is not disabled and when the discharge air temperature falls to the low discharge temperature alarm limit,
the audio alarm is activated and “LOW DISCHARGE AIR WARNING” message is displayed on the processor display
screen.
4. If the optional Energy Saver with Compressor Supplement is used (see sub-menu 3-7), the compressors will be
inhibited for 15 minutes.
5. The alarm will remain until the alarm condition is corrected.
LOW VOLTAGE WARNING ALARM
1. If the measured 24 VAC control voltage that feeds the processor falls to 18 volts, the audio alarm is activated and
“LOW VOLTAGE WARNING” message is displayed on the processor display screen. The low voltage warning alarm is
fi xed in software and is not adjustable.
2. The alarm is a warning only and will not cause operational problems (such as contactor or relay chattering).
3. The alarm will remain until the alarm condition is corrected.
SCHEDULED NORMAL MAINTENANCE ALARM
1. The scheduled normal maintenance alarm is set and/or disabled through sub-menu 3-11.
2. The alarm is a warning only and will not prevent any of the unit functions from operating.
3. The alarm will remain until the alarm condition is corrected.
HIGH PRESSURE/INTERNAL OVERLOAD COMPRESSOR ALARM
1. When the high head pressure switch is tripped or the compressor(s) overload contact opens, the audio alarm is
activated and “HIGH PRESSURE/INTERNAL OVERLOAD: COMP 1” or “COMP 2” message is displayed on the
processor display screen.
2. The alarm will prevent the compressor from operating and be MANUALLY RESET.
3. The alarm will remain until the alarm condition is corrected.
LOW PRESSURE COMPRESSOR ALARM
1. When the low head pressure switch is tripped, the audio alarm will be activated and “LOW PRESSURE COMPRESSOR
1” or “COMPRESSOR 2” message is displayed on processor display screen.
2. The alarm will prevent the compressor from operating but will automatically reset when the low head pressure
condition is corrected.
3. The alarm will remain until the alarm condition is corrected.
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