Cornelius CH1500-CH7500 Manual do Operador descarregar pdf (Página 14)

91961

WARNING: If repairs are to be made to the refrigeration system, make sure electrical power

is disconnected from the unit.

TROUBLESHOOTING

IMPORTANT: Only qualified personnel should service internal components or electrical wiring.

Trouble Probable Cause Remedy

CHILLER DOES NOT

OPERATE. CONTROL

POWER LIGHT “OFF”

A. Control power switch “off”. A. Turn the control power switch to

the “on” position.

B. No power. B. Check the fuse and circuit

breaker.

C. Defective power supply

connection.

C. Check wiring and correct loose or

poor connections.

D. Defective control power

switch.

D. Replace the switch.

E. Defective control transfromer. E. Replace the transformer.

F. 3–Phase Monitor tripped F. Check for correct voltage level on

each phase of incoming 3–Phase

power. Check for correct phase

rotation.

PUMP DOES NOT OPERATE.

PUMP POWER LIGHT “OFF”

A. Pump power switch “off”. A. turn the pump power switch to the

“on” position.

B. Defective pump power switch. B. Replace the switch.

C. Defective control transformer. C. Replace the transformer.

PUMP DOES NOT OPERATE.

PUMP POWER LIGHT “ON”.

A. No water in reservoir. A. Fill reservoir.

B. Restriction in the line to or

from the Chiller.

B. Remove restriction.

C. Open or defective pump

overload relay.

C. Manually reset the relay or

replace if necessary and check

amp setting on overload.

D. Defective pump contactor. D. Replace the pump contactor.

E. Defective pump motor or

damaged impeller.

E. Replace the pump or impeller.

CHILLER DOES NOT COOL.

COOLING LIGHT “OFF”.

A. Defective thermostat. A. Replace thermostat.

CHILLER DOES NOT

OPERATE. COOLING LIGHT

“ON”.

A. LOW PRESSURE ALARM

LIGHT CYCLES ON/OFF.

A. Process water too cold. A. Increase the thermostat setting.

B. Low process water flow. B. Ensure that there is adequate flow

through the process piping.

C. Defective expansion valve. C. Replace the expansion valve.

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