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Short Cycle protection (ASCT)
• Anti-short-cycle timer (ASCT) is designed to protect
compressor from short cycling.
• ASCT is activated immediately following Off cycle of
outdoor unit. Once room temperature is satisfied and
outdoor unit switches off, ASCT does not allow outdoor
unit to restart unit 3 minute time period has elapsed.
• Prevents compressor and heat source from rapid
restarts. Once switched Off, or following power
outage, compressor or heat source does not restart for
minimum of three (3) minutes.
Staggered Start Protection
Systems with electric heat, in heat pump and dry modes
staggered-start feature prevents compressor and electric
heater from starting simultaneously. There is 30 second
delay between compressor start and start of electric heater
while in Dry mode and Heat pump mode.
Minimum Run Time
Minimum on-time prevents compressor or heat source from
cycling off prematurely. Minimum on-time for compressor
and electric heat is two (2) minutes.
Drain Pan Sensor
• Drain pan sensor monitors condensate level in drain
pan. Should water reach critical level, monitor signals
main control unit.
• Microprocessor switches off condensing unit until
fault condition has been cleared, to prevent further
condensate production.
• Fault code flashes on controller’s LED and
automatically resets when fault condition is cleared.
See trouble code table, Table 7, Page 48.
Annunciation
• Controller beeps, providing audio feedback confirming
microprocessor has received its commands.
• Annunciation feature must be activated in
configuration. Selections are OFF and ON.
• OFF - annunciation remains off.
• ON - annunciation beeps with push of any button in On
mode or with push of ON/OFF button while in off mode.
Memory Backup
Control retains all settings, including mode of operation in
event of power failure.
When power is restored, control returns to mode of
operation settings prior to power failure, after three (3)
minute time delay.
CAHV ConTRoLLER fEATURES
