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COMPRESSOR SHORT-CYCLE ALARM
1. The alarm is programmed (ON or OFF) through sub-menu 4-8. A compressor short-cycle alarm will activate if the
compressor has been energized ten (10) times in a one(1) hour period
2. The alarm is a warning only. Compressor operation will continue.
3. One cycle is a combination of compressor starts for cooling or dehumidifi cation functions.
4. If the compressor is started 10 times in a one (1) hour period, the alarm will be activated and the message
“COMPRESSOR SHORT-CYCLE” will be displayed on the processor display.
5. The compressor short-cycle time delay will be increased from fi ve (5) to six (6) minutes for the next hour.
6. The short-cycle alarm will not clear until a one (1) hour period has passed with less than ten (10) compressor starts.
POWER PROBLEM OR RESTART MODE
The power problem or restart mode is programmed through sub-menu 3-10. There are three selections available:
1. AUTOMATIC: NO MESSAGE OR ALARM – The unit will automatically start after a power failure or reset. No audio
alarm will sound. No message will be displayed on the processor display screen.
2. AUTOMATIC: MESSAGE, AUDIO ALARM & RELAY – The unit will automatically restart after a power failure or
reset. The audio alarm will be activated and the message “POWER FAILURE RESTART” will be displayed on the
processor display screen. Pressing the “SILENCE” button (when the message appears on the processor display
screen) will clear the alarm. The alarm will also clear itself fi ve (5) minutes if there is no button activity.
3. MANUAL: MESSAGE, AUDIO ALARM & RELAY – The unit will NOT automatically restart after a power failure or
reset. The “SILENCE” button must be pressed to restart the unit. The audio alarm will be activated and the message
“POWER FAILURE RESTART” will be display on the processor display screen.
NO AIRFLOW ALARM
1. When no airfl ow is detected via the air fl ow switch, the cooling, reheat humidifi cation and dehumidifi cation functions
are locked out until the alarm condition is corrected. Sub-menu 4-24 allows you to adjust the delay the polling of the
air fl ow detector at start-up of the fan from 5 to 180 seconds. This is to minimize false alarms due to air turbulence.
2. The audio alarm is activated and ‘NO AIRFLOW” message will be displayed on the processor display screen.
DIRTY FILTER ALARM
When a dirty fi lter is detected, using a pressure differential switch, the audio alarm is activated and a “DIRTY FILTER:
CHECK FILTERS” message will be displayed on the processor display screen until the alarm condition has been
corrected.
HUMIDIFIER FAILURE: CHECK WATER PRESSURE SWITCH
1. On units with humidifi ers an audio alarm is activated and “HUMIDIFIER FAILURE – CHECK WATER PRESSURE”
message will be displayed on the processor screen if the humidifi er water pressure switch does not sense adequate
supply water pressure.
2. The alarm will prevent the humidifi er from operating until the alarm is corrected.
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