Charger will automatically turn on and conduct a short self-test and battery pack test. All Delta Q
LED’s
will flash in sequence and then a trickle current will be applied to batteries until a minimum voltage is
reached. In Figure 4.5A No. 3 indicates the Bar Graph and No. 2 indicates the lowest LED. Three (3)
amperes is displayed as the lowest LED on the Bar Graph.
If the batteries meet the minimum voltage requirements of the Charger, signifying they are serviceable
(chargeable), the Charger enters the bulk charging (higher amperage-constant current) stage. The Delta
Q
Bar Graph LED’s indicate the electrical current being delivered to the batteries as the Charger moves
through its automatic charge profile. The length of charge time at each level will vary due to battery size
and battery charge depletion. The remote LED will be flashing short green.
NOTICE:
If the batteries are excessively discharged, the Delta-Q Charger will not be able to
charge the complete set of batteries. The Delta-Q RED FAULT LED (Fig. 4.5A No. 6) and the
remote LED will be flashing red.(see Section 4.5.2 Red Light Charger Error Codes). It will then
be necessary to follow the Special Charging for Excessively Discharged Batteries, Section 4.6.
When the Yellow 80% LED (Fig 4.5A No. 4) is lit, the Charger has completed the bulk stage and the
batteries are at approximately 80% state of charge. The 80% LED remains on as the last 20% of charge
is returned to the batteries in the second phase (constant voltage phase). At this time the remote LED will
flash long green.
NOTICE:
You can terminate charging at this point if necessary. The vehicle can be used, but
completing the charge cycle is highly recommended.
Charge completion is when the 100% Green LED is lit (Fig. 4.5 No. 5). The remote LED will be green.
Repeated “Short Charging” leaving the charge short of 100% will shorten operating cycle distance and
reduced battery life.
A Green LED continuously lit indicates the batteries are completely charged. The Charger may now be
unplugged from the AC source. If the batteries will not be used for a length of time, check monthly for the
charge level. It is also acceptable to leave the Charger plugged in. The Delta-Q has the capability to test
and recharge if necessary.
A fault occurring while charging causes the RED FAULT LED and the remote LED to flash with a code
relaying the error. Some errors may require repair by a qualified technician and others may be simply
transient and will automatically recover when the fault condition is eliminated and the Delta-Q cycled by
disconnecting the AC source for a minimum of 11 seconds.
NOTICE:
A Yellow (Amber) flashing LED in the upper Bar Graph (Fig. 4.5 No. 3) and a flashing
yellow remote LED indicates the thermostatic control has limited the Charger output due to
ambient temperature conditions. It is still charging, but at a reduced rate.
4.5.2 RED LIGHT CHARGER ERROR CODES
1 FLASH
= Battery Voltage High: Auto-recover. May be temporary condition, or wrong Charger installed,
i.e. 36 volt Charger on 48 volt battery pack.
2 FLASH
= Battery Voltage Low: Auto-recover. Confirm each individual batteries minimum voltage with a
voltmeter. Two or more 6 volt batteries register less than 5.85 volts, or accumulative total pack voltage
has been discharged to less than 20% remaining. Vehicle operation will cease until batteries are
recharged. See EXCESSIVELY DISCHARGED BATTERIES Section 4.6.
3 FLASH
= Charge Timeout: The charging did not complete in allowed time, 12-14 hours. This may
indicate a battery problem, or that the Charger output was reduced due to high ambient temperatures.
Disconnect AC supply, confirm sufficient ventilation, allow cool down time, and restart Charger.
4-5
