General Warnings - Zapi SEM1 User Manual

- Never connect SCR low frequency chopper with SEM1 because the SEM1 filter
capacitors alter the SCR choppers' work. If it is necessary to use two or more control
units (traction + lift. for ex.), they must belong to the ZAPIMOS family.
- Do not connect the chopper to a battery with a nominal value different from the value
indicated on the chopper plate. If the battery value is greater, the MOS may fail; if it
is lower, the control unit does not "power up".
- During battery charge, disconnect SEM1 from the battery.
- Supply the SEM1 only with battery for traction; do not use a power supply.
- When the chopper is installed, make tests with the wheels raised from the ground, in
order to avoid dangerous situations due to connection errors.
- After the chopper is switched off (key off), the filter capacitor remains charged for
some minutes; if you need to work on the chopper, discharge them using a
10W ÷ 100W resistance connected from the +Batt to the -Batt.
- Electromagnetic susceptibility and emission are strongly influenced by the
installation. Special attention must be given to the lengths and the paths of the
electric connections and the shields.
This situation is beyond ZAPI's control. Therefore ZAPI declines any responsibility for
noncompliance if correct testing is not made (the irradiated emission directive is
EN50081-2).

2.8 GENERAL WARNINGS

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