21
EN
TECHNICAL MANUAL - B CLASSIC / B FUTURA / S CLASSIC
ALARMS
LCD E 020 Indication Alarm description Effect / Symptom
DOOR LOCK TIMEOUT
Door lock (CLOSING) operation
TIMEOUT time elapsed.
When program started, the closing mechanism did
not lock the door within 3” (both switches open - I
motor < 3A).
Possible causes / Checks Solution
Door closed microswitch
faulty – check microswitch.
Check microswitch for proper operation from menu SERVICE/COMPONENT TESTS/
DOOR – SQ20.
Change microswitch - see technical datasheet ST03 - DOOR GEARMOTOR
ASSEMBLY.
Safety pressure switch of
closing system faulty –
check pressure switch.
Check to ensure pressure switch contact closes properly, testing for continuity across
connection points of white wires.
Change pressure switch – see technical datasheet ST04 - PRESSURE
TRANSDUCER - SAFETY PRESSURE SWITCH.
Possible causes / Checks Solution
Door closing servomotor
faulty – check servomotor
for proper operation.
Check servomotor for proper operation from menu SERVICE/COMPONENT TESTS/
DOOR – SQ20.
Change gearmotor - see technical datasheet ST03 - DOOR GEARMOTOR
ASSEMBLY.
Problem with servomotor
worm screw/cross
member threaded bushing
screwing – check for proper
screwing.
Check lubrication of both components.
Check condition of threads of both components.
Check door gasket for proper position.
Change motor endless screw- see technical datasheet ST03 - DOOR
GEARMOTOR ASSEMBLY.
Change cross member threaded.
LCD E 021 Indication Alarm description Effect / Symptom
DOOR LOCK TIMEOUT
Door servomotor operation
TIMEOUT time elapsed
(OPENING).
The door opening system does not release the 2
door microswitches within 3” at cycle end
TIMEOUT time elapsed (both switches are in
closed position).
Possible causes / Checks Solution
Door microswitches faulty –
check microswitches.
Check microswitches for proper operation from menu SERVICE/COMPONENT
TESTS/DOOR – SQ.
Change microswitch.
Door closing servomotor
faulty – check servomotor
for proper operation.
Check servomotor for proper operation from menu SERVICE/COMPONENT TESTS/
DOOR – SQ20.
Change gearmotor - see technical datasheet ST03 - DOOR GEARMOTOR
ASSEMBLY.
Problem with door swing
motion during opening -
check hinge.
Check for proper swing motion when door is opening, it is operated by door-ajar
microswitch pin.
Check cross member hinge and lubricate as required.
LCD E 022 Indication Alarm description Effect / Symptom
DOOR LOCK TIMEOUT Door lock microswitches failure.
Microswitch state not consistent with door locked
condition during cycle.
Possible causes / Checks Solution
Problem with microswitch
wiring – check wiring.
Check to ensure wiring of door approaching microswitch and door closing microswitch
is connected properly
Check microswitches for proper operation from menu SERVICE/COMPONENT
TESTS/DOOR – SQ20.
Change microswitch - see technical datasheet ST03 - DOOR GEARMOTOR
ASSEMBLY.
Problem with door
microswitches – check
microswitches.
Check microswitches for proper operation from menu SERVICE/COMPONENT
TESTS/DOOR – SQ20.
Change microswitch - see technical datasheet ST03 - DOOR GEARMOTOR
ASSEMBLY.
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