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Maintenance, troubleshooting, spare parts and dismantling
Prior to carrying out maintenance works at the chiller, switch it off and wait for at least 30 minutes.
Caution!
Hot surfaces!
During operation, several components can reach surface temperatures of more than +60°C. There is
the risk of burns.
All components concerned are installed inside of the closed housing. The housing must only be opened
by certified skilled personnel.
Some components can reach high temperatures during operation. Avoid any contact until the system or
the component has cooled down.
FAULT
The chiller does not
start.
The refrigerating
compressor does
not work.
The fan of the
condenser does not
work (air-cooled).
Dew point too high
38
POSSIBLE REASON – SUGGESTED MEASURE
Check the power supply.
Check the electric cabling.
Fuse breakdown (see FU1/FU2/FU4 in the electric diagram) in the auxiliary circuit –
replace it and check the proper operation of the chiller.
DMC24- The
LED is on – see the corresponding point.
The internal guard was activated – wait 30 minutes and then recheck.
Check the electric cabling.
DMC24- Internal delay of the device – the display shows the seconds prior to the start-
up.
DMC24- The
LED is on – see the corresponding point.
In the event that the compressor still does not work, replace it.
Check the electric cabling.
Power contactor of the fan is defective (see KV1/KV2 in the electric diagram) – replace
it.
DMC24- The
LED is on – see the corresponding point.
Refrigerant gas loss – contact a specialist for refrigerating plants.
In the event that the fan still does not work, replace it.
Chiller does not start up – see the corresponding paragraph.
The T1 dew point sensor does not record the temperature properly – ensure that the
sensor is pushed down to the bottom of the aluminium tube immersion sleeve.
The refrigerating compressor does not work – see the corresponding paragraph.
The room temperature is too high or the air change insufficient – ensure sufficient
ventilation (air-cooled).
The inlet air is too hot – re-establish the operating conditions indic.on the name plate.
The inlet air pressure is too low - re-establish the operating conditions indic.on the
name plate.
The inlet air throughput is higher than the throughput intended for operation – reduce
the throughput - re-establish the operating conditions indic.on the name plate.
The condenser is dirty – please clean it (air-cooled).
The fan does not work – see the corresponding paragraph (air-cooling).
The cooling water is too hot - re-establish the operating conditions indic.on the name
plate (water-cooled).
The cooling-water flow is insufficient - re-establish the operating conditions indic.on the
name plate (water-cooled).
The chiller does not discharge condensate – see the corresponding paragraph.
The hot-gas bypass valve needs to be re-adjusted – contact a specialist for refrigerating
plants to have the nominal calibration re-established.
Refrigerant gas loss – contact a specialist for refrigerating plants.
BEKOBLIZZ® LC 480-720
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Table of Contents
Troubleshooting
