Parker BSP-MT 10-95/D3 - Page 43

EN | User Manual Identify and eliminate faults
BSP-MT 10-95/D3 41
Fault Possible cause Remedy
Specialised personnel Service technician
Dryer does not switch
over
Solenoid valve Y1/Y2 does
not open correctly.
Check supply voltage, ca-
ble, contacts and solenoid;
replace, if necessary.
••
Solenoid valve Y1/Y2 can-
not be opened properly
(audible humming sound or
valve  apping).
Check supply voltage.
Check pilot valves; replace,
if necessary.
••
Control board defective. Check fuse in supply line
and in the switchbox; re-
place, if necessary.
••
Power supply interrupted,
cable broken.
Reconnect the unit to the
power supply.
••
Compressor might be off. Check compressor synchro-
nisation circuit.
•
Error in control programme. Restart programme.
•
No expansion Solenoid valve Y3/Y4 can-
not be opened.
Check supply voltage, ca-
ble, contacts and solenoid;
replace, if necessary.
••
Solenoid valve Y3/Y4 can-
not be opened properly
(audible humming sound or
valve  apping).
Check supply voltage.
Check spring and solenoid;
replace, if necessary. Check
solenoid valve for contam-
ination; clean or replace, if
necessary.
••
Dryer is continuously
bled
Solenoid valve Y3/Y4
cannot be closed properly
(audible humming sound or
valve  apping).
Check supply voltage.
Check spring and solenoid;
replace, if necessary. Check
diaphragm; replace, if
necessary.
••
Main valve V1/V2 does not
open.
Check main valve, replace
if nec.
••
Dryer is excessively
bled
Solenoid valve Y1/Y2 can-
not be closed
Check solenoid and
diaphragm; replace, if
necessary.
••
Pressure dew point is
not reached
Operating pressure is too
low.
Increase operating pressure.
•
Compressed air volume  ow
is too high.
Reduce compressed air
volume  ow
•