BEEPS   Display                       Explanation                                  Possible cause

1.1    Thermal cutback             over or under temperature          1. Temperature > 92c 0r < -25c
                                                                                                 2. Excessive load on vehicle.
                                                                                                 3. Operation in Extreme enviroment.
                                                                                                 4. Motor brake not releasing

1.2    Throttle fault 1                 throttle fault                               1. Throttle input wire open or shorted.
                                                                                                 2. Throttle pot defective.
                                                                                                 3. Wrong throttle type selected.

1.3   Spd limit pot fault             speed limit pot fault                    1. Speed limit pot wire broken
                                                                                                 2. Speed limit pot faulty

1.4    Low battery voltage         battery voltage too low              1. Battery less 8.5 volts under load
                                                                                                 2. Bad connection or large voltage drop

1.5    Over voltage                    battery voltage too high             1. Battery voltage gretaer than 18 volts
                                                                                                 2. Intermittent battery connection
                                                                                                 3. Charger supplying wrong voltage

2.1    Main off fault                   main contactor driver off fault    1. Main contactor driver failed to open

2.3    Main Cont Flts                main contactor fault                   1. Main contactor welded or stuck open
                                                                                                 2. Brake coil resistance too high
                                                                                                 3. Main contactor driver fault

2.4    Main on fault                  main contactor driver on fault      1. Main contactor driver failed to close

3.1    Proc/wiring fault              HPD fault present for 10 sec      1. Misadjusted throttle pot
                                                                                                 2. Faulty or worn throttle pot
                                                                                                 3. Faulty or worn speed pot

3.2    Brake on fault                 brake on fault                             1. Motor brake manually released
                                                                                                 2. Motor brake switch faulty
                                                                                                 3. Motor brake wire disconnected

3.3    Precharge fault                 precharge fault                           1. Very low battery voltage
                                                                                                  2. Keyswitch and throttle activated together

3.4    Brake off fault                  brake off fault                            1. Motor brake coil open
                                                                                                  2. Motor brake coil shorted

3.5    HPD                               HPD ( high pedal disable )          1. Misadjusted throttle pot
                                                                                                  2. Throttle activated before key switch

4.1    Current sense fault           current sense fault                       1. Short in motor or wiring
                                                                                                  2. Controller failure

4.2    HW Failsafe                     motor voltage fault                     1. Short in motor or wiring
                                                                                                  2. Controller failure
                                                                                                  3. Voltage does not match throttle position

4.3    Eeprom fault                     EEPROM fault                          1. Eeprom failure of fault

4.4    Power section fault            power section fault                    1. Eeprom failure or fault
                                                                                                   2. Short in motor or wiring
                                                                                                   3. Controller failure

       Curtis Controller Fault codes used on Lotus Blake equipment