IV Produkt Envicooler, Operation And Maintenance Instructions

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Page 10
Operation and Maintenance Instructions
Envicooler
2001-03-09
Air handling with the focus on LCC
5. Fault Tracing and Searching for Leakage
5.1 Fault-tracing Schedule
SYMPTOM POSSIBLE CAUSE REMEDIAL MEASURE
Too high temperature in
cooled component/medium The power supply has been interrupted. Check the control/safety switches and
fuses.
No flow or poor flow across the
evaporator. Check that nothing is blocking the flow.
Check that the system is well purged of
air.
The thermostat/control equipment is
incorrectly set/faulty. Adjust the setting or replace the
equipment.
The compressor doesn’t work. See under “Compressor”
The compressor doesn’t
work. The power supply has been interrupted. Check the control/safety switches and
fuses.
The safety circuit has switched out the
compressor. Pressure switches,
temperature monitor, flow monitor, anti-
frosting protection or motor protection. Check and reset if required.
Faulty compressor. Determine the fault. Replace the
compressor.
The low-pressure switch
switches out the
compressor. Too little refrigerant. There is a leak in the system. Seal the
leak and charge with refrigerant.
No flow or poor flow across the
evaporator. Check the flow.
Check the static pressure in the
expansion vessel.
Check the circulation pump.
Too high glycol content. Check the glycol content.
Faulty expansion valve. Check, replace.
Faulty low-pressure switch. Check, replace.
The high-pressure switch
switches out the
compressor. No flow or poor flow across the
condenser. Check the flow across the condenser.
Check the static pressure in the
expansion vessel.
Check the circulation pump.
Too much refrigerant in the system. Reduce the refrigerant volume.
Faulty high-pressure switch. Check, replace.
Substantial frosting on the
evaporator. The expansion valve is incorrectly set/
faulty. Check, replace.
Too little refrigerant. Check in the sight glass. The system is
leaking; seal the leakage; charge with
refrigerant.
The evaporator is fouled. Check the flow, filter if fitted, clean the
evaporator if needed.