Zapi 4Q - Thermal Considerations; General Warnings and Precautions

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1.6 THERMAL CONSIDERATIONS
- Since the heat generated by the controller must be dissipated, it is important to install
it in a well ventilated area with adequate cooling surfaces.
- The cooling system must be scaled according to the use required of the machine;
forced ventilation may be necessary in some cases if air circulation is insufficient and
heat exchange is limited by the type of materials used.
- The power dissipated by the module varies according to the current and the duty
cycle.
1.7 GENERAL WARNINGS AND PRECAUTIONS
- Do not connect the 4Q module to a battery with a different rated voltage to the one
indicated on the module’s rating plate. A higher battery voltage can cause irreparable
damage the MOSFETs. With a lower battery voltage the module will not work.
- The 4Q module must be disconnected when the battery is being charged as the
module can be damaged by overvoltages generated by the battery charger and
ripple currents generated in the capacitors if a low frequency battery charger is used.
- The 4Q module should be powered by batteries for traction only. Do not use rectifier
outputs or power supply units. For special applications contact the nearest ZAPI
technical service centre.
- When starting the machine for the first time keep the wheels raised to avoid
hazardous situations due to possible connection errors.
- When the key is turn off the filter capacitors in the module can stay charged for
several minutes. For safety purposes it is advisable to disconnect the battery and
short circuit the positive and negative power lines of the chopper for a few seconds
using a resistor of between 10Ω and 100Ω .
- The electromagnetic susceptibility and emission is strongly influenced by the method
of installation; particular attention should be paid to the length and lay-out of
electrical connections and to shielding.
Zapi declines all responsibility for malfunctions caused by the above mentioned
factors, particularly if the machine manufacturer fails to carry out the tests required by
current legislation.