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GF0600059RevB06, November 2006 Metro Power III Owner’s Manual
34
IX TROUBLESHOOTING
TROUBLESHOOTING, POWER DRIVE
Most power drive problems are battery related. As batteries age, their ability to hold a charge decreas-
es. Old batteries discharge much more quickly than new batteries under the same driving conditions.
is results in a decrease in the distance the wheelchair can travel before batteries need to be charged.
is decrease is often misinterpreted as a problem with the wheelchair system, when in fact the bat-
teries have simply reached the end of their useful life and should be replaced. Sometimes expensive
components are unnecessarily replaced when the batteries are the real problem. If an electrical prob-
lem exists, check the following:
Batteries
Make sure the batteries are fully charged. Test unsealed lead acid batteries with a calibrated hydrom-
eter, as directed in wheelchair owner’s manual. Keep battery posts and terminals clean and tight.
Circuit breaker
Your wheelchair is equipped with circuit breakers, to protect the electrical circuits from overload, in
each of the battery box lids. In the event of an overload, the circuit breaker button will pop out. To
reset the circuit breaker, push the button in.
TROUBLESHOOTING, INTEGRAL CONTROLLER
A general diagnostic guide is first, followed by the battery gauge diagnostic guide. Use the general di-
agnostic guide first; if you are unable to solve your problem, use the battery gauge diagnostic guide.
Warning: If problems or fault indicators persist, do not attempt to operate the
wheelchair. See a qualified Graham-Field dealer. Operation of the wheelchair could
be unsafe.
General diagnostic guide
SYMPTOM BATTERY POSSIBLE CAUSE CORRECTIVE ACTION
GAUGE
LIGHTS
Wheelchair Off System off Turn ON/OFF switch on
won’t drive
Batteries not Connect batteries
connected
Batteries not Correct connections
connected properly, or
polarity reversed
Circuit breaker open Reset circuit breaker
Batteries severely Recharge / replace batteries
discharged