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FAQ

FAQ (Frequently Asked Questions)

 

 

FAQ (Frequently Asked Questions)

 Q

What wiring changes are required on my existing installation?

A

As well as running a wire to your alternator field terminal, you will need an ignition source to the ZM5 and a battery positive and earth.

Q

Will this unit work through a VSR (Voltage Sensitive relay)?

A

Yes. A good way to allow dual battery charging.

Q

Will this unit work through a diode splitter?

A

Yes. The ZM5 can compensate for the typical voltage drop over a diode bank, providing that the battery sense wire is on the battery side of the diode bank.

Q

Can I fit a ZM5 to an outboard motor?

A

No.  For the ZM5 to work it must have a field control, an outboard motor does not have this function.

Q

Can I fit a ZM5 to a solar panel or wind turbine?

A

No.  For the ZM5 to work it must have a field control.

Q

Can the ZM5 run two alternators?

A

Yes, check our web site for wiring configuration.

Q

What changes are required to my alternator?

A

This does depend on your alternator type; some are easy to convert others are a bit more difficult. Check our web site for wiring configuration.

Q

Can I modify my own alternator?

A

Yes. It is a matter of running a field wire to the appropriate side of the brush block.

The ZM5 N controls the earth side of the brushes.

The ZM5 P controls the positive side of the brushes.

Q

What is the difference between N and P switching

A

Certain manufacturers elect to switch the positive brush whilst the majority of others switch the negative brush, as a user you do not know the difference in an operational sense.

Q

Can you provide the modification required for my alternator?

A

Yes, call with the details first.

Q

Can you refurbish my alternator and convert it for an external regulator?

A

Yes, we do this on a regular basis for clients.

Q

I have been told that a smart regulator is hard on my alternator?

A

The old adage, the harder you work something the faster it is going to wear out.  Good regular maintenance must be adjusted accordingly.  There are some less suitable alternators out there. Call and discuss your brand.

Q

Why does my voltage vary with lower engine rpm?

A

It is a indication of the alternator output being too low for that given rpm, so your battery capacity and or status is too low for the unit to be able to achieve the desired set voltage.

Q

Can I connect the V+ brush directly to the B+ terminal?

A

Only on a ZM5 N model. This will work fine and will not drain your battery as the ZM5 field circuit is disconnected during ignition off situations.

Q

What is the system for switching over from Absorption to Float?

A

It is a combination of time and a sensing circuit detecting the state of charge of your batteries.  The Green LED should illuminate to indicate the float voltage setting; this should be approximately in the range of 90 - 100 minutes of operation.

Q

Sometimes my Overvoltage buzzer sounds although my voltage setting is correct.

A

At times there are voltage spikes within your electrical system that can trigger a voltage spike typically these are inductive loads (motors of high current draw). The ZM5 is detecting these spikes and isolating the system, reset the ignition and monitor what is creating the spike. If it cannot be prevented you may need to adjust the setting threshold up slightly to reduce the annoying warning.

Q

Why does my overvoltage buzzer and LED sound at times when I definitely do not have an overvoltage situation?

A

Could well be an over temperature situation which trips the same overvoltage buzzer. The system will activate with component internal failure or fan failure.

Q

What internal temperature leads to a shutdown of the system?

A

Typically, 70 degrees C of the output MOSFET

Q

What is the purpose of the supplied electrolytic capacitor for (specially for N type ZM5 and NOT the P type ZM5)

A

The N switching configuration creates an inductive load which is felt at the ZM5 output stage MOSFET. This manifests as very high temperatures in this output stage. The P type ZM5 does not have this characteristic and does not require the capacitor fitted.