Optional Graphic Panel; Indicator Lights; Switches - AEC PCA SERIES Operation And Installation Manual

6
6-1

Indicator Lights

PUMP ON (green)
This indicator lights when the pump is running.
COMPRESSOR ON (green)
This indicator lights when the compressor is operating.
HIGH REFRIGERANT PRESSURE (red)
This indicator lights if the condensing pressure exceeds a safe level. The chiller goes to
Idle mode until the high refrigerant pressure cutout resets. The light then goes out and
the chiller automatically restarts. Call a qualified refrigeration service technician for
service.
LOW REFRIGERANT PRESSURE (red)
This indicator lights if the refrigerant pressure drops below a safe level. The
compressor will stop and remain off until the pressure reaches a safe level. The light
will go out and the chiller will then resume operation automatically.
LOW WATER FLOW (red), PCA units without pump only
This indicator lights if the flow switch senses chilled water/glycol flow through the
evaporator dropping to an unacceptable level. The compressor will stop until the flow
switch senses adequate flow and restarts the chiller.
6-2

Switches

POWER
This switch energizes the control circuit and also turns off the chiller.
PCA Series Chillers

Optional Graphic Panel

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