Service manual

8 – 3

Vission 20/20 • Operation and Service Manual •Vilter/Emerson • 35391SC 1.9

for a time period that exceeds the setpoint of the

Accumulative Anti-Recycle Timer, then when the

compressor shuts down, it will be allowed to restart

immediately.

Compressor Interlock Bypass:

• Once the Vission 20/20 has sent a command to the

compressor starter to start, a return signal is expect-

ed. This timer deﬁ nes how much time to wait for that

signal before setting a trip condition.

High Motor Amps Safety Bypass:

• Starting motors can typically pull much more than

its rates full load amps for a short time. This timer ig-

nores that sudden inrush of current for the speciﬁ ed

time.

Emergency Stop Timer:

• Deﬁ nes the amount of time the compressor is in a

False start condition before activating the Emergency

stop. The emergency stop output can be connected

to a shunt-trip in the case of a run away compressor

to remove all power to the system.

Low Suction Pressure Safety Bypass:

• Sets the time that the compressor is allowed to run

at lower suction pressure then would usually be allow

at start-up.

High Superheat Temp Safety Changeover:

• This timer activates at shutdown and changes the re-

start parameters if the time has not been met.

Section 8 • Timers

Figure 8-2. Timers Screen - Page 2