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QM-7 SERIES SERVICE MANUAL

PAGE 5.2

JANUARY 2012 SUNRISE MEDICAL

Section 5

d. Operate the power chair at high speed by

operating the joystick in a high-speed proﬁ le. The

motors should put approximately a 5 to 10 amp

load on the batteries.

e. Continue to operate the motors for 60 seconds.

Record the readings and compare them to the

following:

i. During the ﬁ rst 5 seconds, normal voltage

drop should be approximately .5 to .6 VDC.

ii. During the remaining portion of the 60

seconds, the voltage should stabilize, dropping

no more than an additional .1 to .2 VDC.

iii. At the end of the 60 seconds, release the

joystick.

f. At the end of a 5 minute rest, note the voltage

recorded on the Multimeter. Normal indication at

the end of a 5 minute rest is typically the starting

voltage, or no more than .1 VDC less.

fig. 5.2.1

Notes:

• A rapid drop of approximately 1.5 or more during the ﬁ rst 5 seconds indicates a shorted cell

in one or both of the batteries. The battery terminals should be checked to ensure that they are

tight and clean, and then the test should be repeated. If the terminals are tight, the batteries

should be replaced. Refer to Battery Removal section of this manual.

• A slow drop of more than .8 volts during the ﬁ rst few seconds indicates a weakened pair

of batteries. Evaluate the age of the batteries and the use they have received, and consider

replacing them.

• If the voltage does not return to .1 VDC of the starting voltage at the end of the 5 minute

test, evaluate the age of the batteries and the use they have received, and consider replacing

them.

Quickie QM-7 Series User Manual

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