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7. Number of floating balls indicates charge.
NUMBER OF FLOATING BALLS
0 Discharged
1 25% Charged
2 50% Charged
3 75% Charged
4 100% Charged
* 5 Overcharged
* Check charging system.
8. Flush the liquid back into the same cell after reading
the float. Repeat this step until all cells have been
properly read. A shorted or dead cell can be detected
when it is the only cell that doesn’t charge.
TROUBLESHOOTING
T
R
O
U
B
L
E
S
H
O
O
T
I
N
G
2. Set the digital multimeter to measure ohms.
3. Measure the resistance between the two (2) motor
contacts.
NOTE: A normal reading is between 1 and 5 ohms (W).
A reading of 0 ohms (W) or in excess of 15 ohms (W)
indicates a problem. High readings are generally caused
by bad connections and/or damaged brushes. Contact
authorized dealer or Invacare.
9. Flush the hydrometer in cold running water by allow-
ing the water to rise into the hydrometer as far as
possible. Do this several times to guard against burn
damage.
10. Replace the battery caps.
11. Reinstall battery box(es). Refer to INSTALLING/RE-
MOVING BATTERY BOX(ES) in PROCEDURE 6
of this Manual.
MOTOR TESTING (FIGURE 3)
WARNING
Invacare recommends that the following proce-
dures be performed by an Authorized Dealer or
Qualified Service Technician.
1. On the 4-pin motor connector, locate the two (2) con-
tacts in the red and black housings.
FIGURE 2 - USING A HYDROMETER
FIGURE 3 - MOTOR TESTING
MOTOR BRUSH INSPECTION
(FIGURE 4)
WARNING
Invacare recommends that the following proce-
dures be performed by an Authorized Dealer or
Qualified Service Technician.
Long End Cap Motors (Internally Concealed Brushes)
NOTE: There are two (2) contact brushes on P7E motors.
Motor brushes are located under the motor end cap. Re-
move the end cap, by removing the two (2) phillip screws.
NOTE: It is very important to note which way the brush
comes out of the motor. It MUST be placed into the motor
exactly the same way to ensure good contact with the
commutator.
Number of Balls Will
Vary According to
Change
Motor Connector
OHMmeter