FORM NO. 56043107 - Advolution
™
2710 / UHR 70-1700 - 29
WHEEL DRIVE SYSTEM
Low Current A1 Speed Control Pin Key Detail
Pin # Wire Color Controller Pin Description & Function
1 - Open not used
2 - Open not used
3 Vio/Brn Throttle Pot R1 pot high input
4 Gry Throttle Pot R1 pot wiper input
5 Grn KSI (key switch input) : Battery (+) powers up controller logic circuits
6 Red/Wht
Auxiliary Driver: Battery (-) output to main control box to turn on (activate) the pad motor & release
the electromagnetic parking brake. Pin #6 will read approximately 36 volts when the foot-pedal is in
Fwd or Rev.
7 - Open not used
8 Grn/Blk
Battery (+) from the main control box (J2-2) 0 volts M1 (open) max transport speed selected.
36V M2 (closed) burnishing speed selected.
9 Orn/Blk Status Fault: Speed controller fault output to the main I/O Panel indicator light (horn LED).
10 – Open not used
11 – Open not used
12 – Open not used
13 Brn/Blk Throttle Pot R1: pot low input (-)
14 Orn Electromagnetic Brake: Parking brake output (+)
15 – Open not used
16 Yel/Wht Rev/Alarm Driver output: Battery (-) command turns on back up alarm
17 – Open not used
18 Vio/Brn Speed limit pot input connection (+). Note in this application it is tied to the pot high pin # 3.
WHEEL DRIVE TROUBLESHOOTING GUIDE
Problem Possible Cause
• Wheel drive motor will not run in
forward and reverse.
• Batteries need charging (low battery voltage, recharge batteries)
• Wheel Drive Motor Circuit Breaker (CB2) tripped
(reset 40A circuit breaker)
• Control Circuit Breaker (CB1) tripped
(reset 5A circuit breaker)
• Y1 parking brake (electromagnetic) not releasing. Note: Check
system voltage at brake, a reading of O volts brake is set and at 36
volts brake is released with foot pedal activated.
• Emergency Stop Switch (S10) tripped (Turn knob CW to reset)
• Safety Switch (S2) in seat not closed (check seat switch)
• Defective Wheel Drive Motor (replace motor) *
• Defective Throttle Potentiometer (R1) (replace) *
• Test the Fwd & Rev (R1) wiring outputs (pins 3, 4 & 13) at the
speed control for an open. Repair wiring or replace the R1 pot.
• Wheel drive in one direction only, loss of either
forward or reverse.
• Check potentiometer.
• Controller can’t change electrical polarity to wheel motor
replace the (A1) speed control.
• Hour meter/status display shows an error
03 fault code.
• Speed controller has sensed an operation error code fault.
(see the Status LED Fault Codes (Table 1) in the Electrical
System)
* = See Curtis Speed Control Troubleshooting Section.
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