Troubleshooting guide

· Unload Rate 1 – If the system pressure falls be-

low the Unload Rate 1 pressure setpoint for the

time specified in the Unload Rate 1 Timer, Central

Control will attempt to decrease the capacity of

the system.

Unload Rate 2 – If the system pressure fails be-

low the Unload Rate 2 pressure setpoint for the

time specified in the Unload Rate 2 Timer, Central

Control will attempt to decrease the capacity of

the system.

Stop – If the system pressure falls below the Stop

setpoint, Central Control will immediately try to

shut down the lowest priority lag compressor. If

there is only one compressor running, Central Con-

trol will shut down.

CAP Load Timers – These timers are directly re-

lated to the setpoint values described above. The

timers are the minutes and seconds that theCentral

Control algorithm will hold before deciding on an

action. The CAP Load Rate Timers are related to

the appropriate Load 1 and 2 increase setpoints

described above.

CAP Unload Timers – The Capacity Unload Rate

Timers are similar to the timers described above,

however, they work to decrease system capacity.

The CAP Unload Rate Timers are related to the

appropriate Unload Rate 1 and 2 decrease setpoints

described previously.

Machine Start Time – This timer is the time the

system will wait until another compressor is started

in an attempt to increase capacity.

Force Priority 1 Compressor On Checkbox -

When checked this will override other sequencing

logic and priority 1 compressor will always run.

Pressing the box alternating checks and unchecks

it.

Compressor Sequencing (Max 5 Compressors)