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| User Manual
Identify and eliminate faults
BSP-MT 1-8/D3
45
Fault
Possible cause
Remedy
Specialised
personnel
Service
technician
Dryer cannot be
switched over
Solenoid valve Y1/Y2 can-
not be opened.
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 fl apping).
Check supply voltage.
Check spring and solenoid;
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 fl 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 fl apping).
Check supply voltage.
Check spring and solenoid;
replace, if necessary. Check
diaphragm; replace, if
necessary.
•
•
Dryer is excessively
bled
Solenoid valve Y1/Y2 can-
not be closed
Check solenoid and
diaphragm; replace, if
necessary.
•
•
