Page 56/60 H2B USER'S MANUAL - 550145G
6.4 SETTING THE PROPORTIONAL SOLENOID VALVE
- For handling the solenoid valve, it is necessary to fit the potentiometer and the descent
request microswitch.
1) Carry out the potentiometer signal acquisition using the “PROGRAM VACC” function.
2) With the lever in minimum speed position, set the “MIN VALUE VOLT” parameter by
incrementing the level until it begins to descend.
3) With the lever in maximum speed position, set the “MAX VALUE VOLT” parameter by
decreasing the level until you notice that the descent speed begins to reduce.
4) Acceleration and deceleration are set by obtaining the right compromise between
response speed and smoothness of movement.
6.5 H2B LIFTING DIAGNOSIS
Description of the alarms signalled by the diagnostic LED.
The alarm code is shown in parentheses. A detailed description is given in the section
“DECODING THE ALARMS DISPLAYED ON CONSOLE”.
1 BLINK = Logic anomaly (EEPROM DATA KO, EEPROM PAR. KO, EEPROM CONF.
KO, EEPROM OFF-LINE, CHOPPER NO CONF, WATCHDOG).
2 BLINKS = Running request on startup or error in handle/speeds sequence (INCOR-
RECT \ START).
3 BLINKS = Error on VMN test (NO FUL CONDUCTION).
4 BLINKS = Accelerator high in standby - this error inhibits machine operation
(VACC > 1 V).
5 BLINKS = Error in reading current - this error inhibits machine operation (1 HIGH AT
STAND, I=0 EVER).
6 BLINKS = Malfunctioning of the contactor driver circuit (DRIVER SHORTED, COIL
SHORTED).
7 BLINKS = Excessive temperature, greater than 79°C (TH. PROTECTION).
CONTINUOUS BLINKING (32 BLINKS) =Low battery charge, battery with < =10% of
residual charge (BATTERY).
6.5.1 Decoding the alarms displayed on console (H2B LIFTING)
1) VMN LOW
The test is carried out in standby. If the VMN voltage is lower than 1/3 of the battery
voltage, an alarm is signalled. Possible causes:
a) Check the motor wiring to make sure it is correct.
b) Chopper broken, replace.
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