User manual
Quick guide P9-0135-Q
 11 of 20
Version 1.0.0/2012 
Medema Production A/S
LED 
CODE
PROGRAMMING 
LCD DISPLAY
EXPLANATION POSSIBLE CAUSE
2,2 HPD HPD fault 1. Wrong sequence of KSI, 
 power activation and input 
 data for throttle
2. Wrongly set potentiometer 
 for throttle
2,3 PROC/WIRING 
FAULT
HPD fault displayed
for >5 sec. 
1. Wrongly set throttle
2. Potentiometer for throttle 
 defective
3. Throttle mechanism 
 defective
2,4 SPD LIMIT POT 
FAULT
Fault in speed limit 
potentiometer
1. Wiper cable for speed limit 
 potentiometer defective
2. Speed limit potentiometer 
 defective
3,1 BB WIRING 
CHECK
Fault in emergency 
return cable
1. BB cable open
2. BB check cable open
3,2 EM BRAKE DRVR 
FAULT
Driver fault in 
electromag. brake
1. Coil on electromagnetic 
 brake short-circuited or 
 open
2. Cable for electromagnetic 
 brake open
3,3 THROTTLE FAULT 
1
Fault in throttle 1. Input wire for throttle open
2. Short circuit of input wire 
 for throttle til B+ or B-
3. Defectective throttle 
 potentiometer
4. Wrong choice of throttle 
 type
4,1 LOW BATTERY 
VOLTAGE
Low battery voltage 1. Battery voltage <16 V 
 (24V models), 
 <21V (36V-models) or 
 <27V (48V-models) 
2. Corroded or loose battery 
 clamp
3. Loose clamp on control 
 unit
4,2 OVERVOLTAGE Overvoltage 1. Battery voltage >36 V 
 (24V models), 
 >48V (36V-models) or 
 >60V (48V-models)
2. Vehicle in use with charger 
 connected










