Testing And Repair Works On Power Supply; Testing Battery Voltage And Charge Testing; Testing The Individual Voltage Of The Batteries - Invacare Twister Service Manual

Twister / Twister Junior

14 Testing and repair works on power supply

14.1 Testing battery voltage and charge testing

Caution:
•
Risk of short circuit. Take care with tools. Do not bridge battery poles.
•
Danger of crushing! Keep in mind the heavy weight of the batteries
•
For battery replacement, use exclusively the gel batteries of brand
"Sonnenschein", as indicated in the spare parts catalogue.
Note:
•
If the total voltage is below 24 V even though the batteries being charged, the
battery contacts and the guide pins and exterior connection sockets are to be
checked for corrosion or damage.
•
If during operation the battery voltage is falling below 23 V, the power supply to
the motors will be interrupted and the display on the joystick box will be blinking.
•
Exact information on the condition of the batteries can be obtained by means of a
capacity test. This can only be performed by the manufacturer.

14.1.1 "Testing the individual voltage of the batteries"

Test the individual voltage U on the batteries that have been taken out by means of a
Multimeter (measuring range 50 V / 25 V DC).
Test Fault
• Voltage under ⇒ Battery not completely
12V?
• Voltage under ⇒ Battery fully discharged.
9.5V?
• Voltage under ⇒ Check fuses.
0V?
Issued: 21.01.02
charged.
The fuses are mounted
directly on the positive
battery terminal.
See also chapter:14.3
Chapter:14.2
Page 133
Service Manual
Remedy
⇒ Charge battery
See chapter 14.4.
⇒ Pre-charge
battery.
See chapter 14.4.
⇒ "Ah Batter"
Check master fuse
(50 A) of battery
and cable /
connections,
replace if
necessary, replace
battery if
necessary
+
U