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Dew point too low.
Extreme pressure
drop in the dryer.
The dryer does not
drain the
condensate.
The dryer
continuously
discharges
condensate.
Water in the line.
The high-pressure
switch HPS has
triggered.
The LPS low-
pressure switch was
triggered.
DRYPOINT® RS 700-3500 HP45 NA
The fan runs continuously – ensure perfect functioning of the fan power contactor (see
KV1/KV2 on the electric diagram) and/or of the pressure transducer (see BHP on the
electric diagram) – (air-cooled).
The ambient temperature is too low – re-establish the conditions indic.on the name
plate.
The hot-gas bypass valve needs to be re-adjusted – contact a specialist for
refrigerating plants to have the nominal calibration re-established.
The dryer does not discharge the condensate – see the corresponding paragraph.
The pressure dew point is too low – the condensate is frozen, therefore, air cannot
enter – see the corresponding paragraph.
Make sure that the connection hoses are not pinched off.
The system pressure is too low and condensate is not discharged – re-establish the
nominal conditions.
Valve for the condensate drainage is closed – open the valve.
Check the electric cabling.
Pressure dew point too low – the condensate is frozen – see the corresponding
paragraph.
BEKOMAT-discharge unit does not work properly (see BEKOMAT manual).
BEKOMAT discharge unit is dirty (see BEKOMAT manual).
The dryer does not start – see the corresponding section.
If installed: untreated air flows through the bypass group - close it.
The dryer does not drain condensate – see the corresponding paragraph.
The pressure dew point is too high – see the corresponding paragraph.
Check which of the following reasons is responsible for the triggering:
1. The room temperature is too high or the air change insufficient – ensure sufficient ventilation
(air-cooled).
2. The condenser is dirty – please clean it (air-cooled).
3. The fan does not work – see the corresponding paragraph (air-cooled).
4. The cooling water is too hot – re-establish the operating conditions indic. on the name plate
(water-cooled).
5. Cooling-water flow insufficient - re-establish the operating conditions indic. on the name
plate (water-cooled).
Re-adjust the high-pressure switch, press the corresponding push button - check the
dryer for proper operation/function.
The HPS pressure failed or is defective – contact a specialist for refrigerating plants –
replace the high-pressure switch.
Refrigerant gas loss – contact a specialist for refrigerating plants.
The low-pressure switch is automatically reset as soon as the nominal conditions are
re-established – check the dryer for proper functioning.
Maintenance, troubleshooting, spare parts and dismantling
39
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