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19NetworkAIR FM DX 60 Hz Operation, Maintenance, and Troubleshooting
System delays
Path: Main > Setup > System # > System Config > System Delays
The System Delays protect the Modules in the System from excessive wear and damage and keep the
modes (cooling, reheat, and dehumidify) from working against each other.
Comp Min ON. The delay begins when the compressor engages and then prevents the compressor from
disengaging until the delay has expired. It protects the compressors from rapidly cycling between on and
off and pushing all of their lubricating oil out into the refrigerant line.
Caution: Reducing the Comp Min ON delay can shorten the compressor life by causing
excessive wear and damage.
Comp Min OFF. Th eThe delay begins when the compressor disengages and then prevents the compressor
from engaging until the delay has expired. It protects the compressors from rapidly cycling between on
and off and pushing all of their lubricating oil out into the refrigerant line.
Caution: Reducing the Comp Min OFFdelay can shorten the compressor life by causing
excessive wear and damage.
Cndsr Vlv Dly. The condenser fluid valve close delay begins when the compressors disengage, and then
keeps coolant flowing through the heat exchanger until the delay expires. Once the delay expires, the
condenser fluid valve closes.
Intrstg Dly. The interstage delay begins when the first compressor (stage 1) in a Module engages. It
prevents a second compressor (stage 2) in a System from engaging until the delay has expired.
Start-up Dly. The start-up delay begins when the System is started and initialized. The System cannot
begin operation until this delay has expired. Use the start-up delay to restart equipment sequentially in
your room after a power loss.
Mode Dly. The start-up delay begins when the blowers start. It allows the sensors to obtain an accurate
reading of the room conditions and it allows the System to check for major alarms before engaging
environmental control functions.
Communication Loss Shutdown Delay. Set the communication loss shutdown delay. The delay
begins when an Expansion Module loses communication with the Main Module of a System. If
communication is not restored before the delay expires, the Expansion Module will shut down. Set the
delay for up to twenty-four hours, or set the Expansion Modules to continue operating if communication
with the Main Module is lost by selecting Disabled.