Coolpak PCA050, Operation Manual

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6 Optional Graphic Panel
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 cut-out 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.