Controller - Invacare HMV Zoom 300 Service Manual

Controller

NOTE: For this procedure, refer to FIGURE 13.2.
SYMPTOM
Status light is OFF.
Status light is perma-
nently ON, but the
scooter does not move.
Status light is FLASHING.
Part No 1122167
SECTION 13—MAINTENANCE AND TROUBLESHOOTING
PROBABLE CAUSE
Programmer is plugged in.
Battery supply voltage may
not be present on the
controller terminals.
Key may be off or the
wiring and fuses may not be
intact.
Status LED may not be
fitted correctly.
Park brake solenoid or
relay may not be working.
Voltage on the Throttle
terminals may be incorrect
when Throttle is in neutral.
Voltage on the Motor
terminals may be incorrect.
Inhibit status may be
incorrect.
SOLUTIONS
Unplug programmer.
Connect a voltmeter between Battery + and Battery -,
negative probe on Battery -. The voltmeter should
measure between 23 and 27 volts.
• If the voltage is negative, check for correct battery wir-
ing polarity.
• If the voltage is 0V, check the circuit breaker and for
open circuit wiring.
Connect a voltmeter between the Key Switch terminal
and Battery -. The voltmeter should read at least 20
volts.
• If the voltage is 0V, use the voltmeter to check the wiring
from Battery + to the key switch itself and back to the Key
Switch terminal.
Move the throttle to the full-speed position and listen
carefully for the operation of the park-brake solenoid or
the relay in the controller.
• If you can hear the solenoid or the relay, the problem is
not with the throttle or inhibit circuitry.
• If you can hear the solenoid but the motor does not
turn, look for an open circuit in the motor wiring.
Connect a voltmeter between Battery - and the following
Throttle pins:
Battery - » Throttle -
Battery - » Throttle Wiper
Battery - » Throttle +
When the Throttle is moved in the forward and
reverse directions, the voltage on Throttle Wiper
should increase and decrease by 2V.
• If the throttle voltages are incorrect, an incorrect throttle
potentiometer is being used and/or it is not correctly
calibrated.
• If the voltage swing does not occur, check the
potentiometer and wiring for open circuits.
Connect a voltmeter between Park Brake + and Park
Brake - The voltmeter should measure 0V when
the throttle is in neutral. The voltmeter should
measure 24V when the throttle is out of neutral.
• If the voltages are incorrect, check the park brake and
park brake wiring.
Connect a voltmeter between Inhibit and Battery -. The
voltmeter should measure 5V.
• If the voltage is 0V, check that an inhibit switch is not
engaged (e.g., from the battery charger). When 0V is
applied to this terminal, driving will be inhibited.
Check Error Codes chart on page 102.
101
0.5±0.1 V
2.5±0.1 V
4.5±0.1 V
Zoom 300 and Zoom 400