Beko Bekoblizz LC 12-355 Instructions For Installation And Operation Manual page 37

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.
 Dew point too low.
 Extreme pressure drop
in the chiller.
 The chiller does not
drain the condensate.
BEKOBLIZZ® LC 12-355
POSSIBLE REASON – SUGGESTED MEASURE

Check whether or not the chiller is connected with the electric mains.

Check the electric cabling.

The internal heat protection of the compressor was activated – wait 30 minutes and then
retry.

Check the electric cabling.

If installed – replace the internal heat protection and/or the start-up relay and/or the starting
capacitor and/or the operating capacitor.

If installed - HPS pressure switch was activated – see the corresponding point.

If installed – the LPS pressure switch was activated – see the corresponding point.

If installed – the TS safety temperature switch was activated – see the corresponding point.

In the event that the compressor still does not work, replace it.

Check the electric cabling.

LC 12-35 - The DMC15 electronic control unit is faulty – replace it.

LC 55-355 - The PV pressure switch is defective. Contact a BEKO service technician.

There is a leak in the refrigeration cycle – contact a BEKO service technician.

In the event that the fan still does not work, replace it.

The chiller does not start up – see the corresponding point.

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 point.

The ambient temperature is too high or the room ventilation insufficient – ensure sufficient
ventilation (air-cooled).

The inlet air is too hot – re-establish the nominal conditions.

The inlet air pressure is too low – re-establish the nominal conditions.

The inlet air throughput is higher than the throughput of the chiller – reduce the flow rate -
re-establish the nominal conditions.

The condenser is dirty – please clean it (air-cooled).

The condenser fan does not work – see the corresponding point (air-cooled).

The cooling-water flow is insufficient – re-establish the nominal conditions (water-cooled).

The chiller does not discharge the condensate – see the corresponding point.

The hot-gas bypass valve needs to be re-adjusted – contact a BEKO service technician to
have the nominal setting re-established.

There is a leak in the refrigeration cycle – contact a BEKO service technician.

LC 12-35 - The fan runs continuously - the
glowing continuously - see specific point.

LC 55-355 - The fan runs continuously – the PV pressure switch is defective – replace it
(air-cooled).

The ambient temperature is too low –re-establish the nominal conditions.

The hot-gas bypass valve needs to be re-adjusted – contact a BEKO service technician to
have the nominal setting re-established.

The chiller does not discharge the condensate – see the corresponding point.

The dew point is too low – the condensate is frozen and blocks the air – see the
corresponding point.

Check the flexible connection hoses for obstructions.

The shut-off valve at the condensate outlet is closed – open it.

Check the electric cabling.

The dew point is too low – the condensate is frozen – see the corresponding point.

The BEKOMAT condensate drain does not work properly (see BEKOMAT MANUAL).
Maintenance, troubleshooting, spare parts and dismantling
yellow LED of DMC15 controller is
37