Tronair JP30, Operation & Service Manual, Page: 13 / 83

Models: JP30, JP30L
Electric Towbarless Tug
07/2015 | Rev. 10 Page | 9
8.0 BATTERY CARE (continued)
8.3 PRECAUTIONS
1. Keep battery tops clean and dry.
2. Keep vent caps tightly in place.
3. Do not use battery with specific gravity below 1.155.
4. Be sure battery compartment cover is removed and they are well vented while charging batteries.
5. Do not overcharge batteries. Allow several hours use between charges.
8.4
BATTERY MAINTENANCE
See Appendix I for additional information on battery maintenance.
9.0 TROUBLESHOOTING
9.1 GENERAL TROUBLESHOOTING
9.1.1 If The Tug Will Not Run

Is the E-stop button depressed? Pull up to release.

Check the wire connections on the joystick and make sure no wires have come loose.

Check switch positions. Are E-stop and start switches on?

Are you squeezing the deadman switch on the Joystick. The deadman switch must be squeezed before moving the
Joystick and held continually for the vehicle to move.

Check that all battery connections are tight and show no signs of corrosion.

Check that all batteries are fully charged and that none has defective cells.

Check wiring for loose connections.

Check for faulty forward-reverse switches. They are on the bottom of the joystick.

Check for worn motor brushes.

Check direction switches on the Joystick and see if they are engaging and sending voltage to controller.

Make sure wire harness plugs are seated correctly in controller.
9.1.2 If Tug Runs But Lacks Sufficient Power

Check batteries
– specific gravity

Check to see that brakes are not dragging.

Check all battery and switch connections to see that they are clean and tight.

Check for loose wiring.
9.2
BATTERY CHARGER TROUBLE SHOOTING
The battery charger is configured to best match the CROWN batteries that are shipped with the JETporter. In this
configuration, the charger charges the batteries until the charging voltage reaches 56 Volts DC. At that time, a counter starts to
begin a 3 hour gassing cycle before the charge is shown as complete. This means that any time the charger is plugged in,
even if the batteries are fully charged, the charger will run for a minimum of three hours. If necessary, for location operational
purposes, the length of the charging cycle (gassing period) can shortened. Contact Tronair or contact Quick Charge direct
from the information located in the Quick Charge Manual (Appendix V).
Pressing the Equalize button during the charge cycle will run a second 3 hour gassing cycle when the first charge is complete.
There is a panel meter in the charger for purposes of trouble shooting. The meter has a toggle to switch from voltage to
amperage. When the charger is on, the voltage will be the charging voltage and the amperage will be the charging amperage.
When the charger is off (not plugged into an AC source) the voltage will be battery voltage and the amperage will read at or
near 0.
Remove the rear panel from the driver’s console to access the charger panel meter.
9.3
CRADLE UP OR DOWN DOESN’T WORK
If the cradle goes one direction but not the other, or goes really slow in the other direction it could be a faulty coil on one of the
cartridge valves or missing wiring if wiring has been disconnected for some reason. If one coil doesn’t work then fluid can flow
one direction because the powered side cartridge valve will work and the return fluid will push open the other valve. But the
reverse will not work as the non-
working cartridge valve can’t open therefore preventing fluid from getting to the cylinders.