Curtis 1226 User Manual

8 — DIAGNOSTIC AND TROUBLESHOOTING
Curtis Model 1226 – September 2019
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pg. 78
Table 33 Faults, cont’d
Code Fault and Fault Action Possible Causes Set and Clear Conditions
2,4
Undervoltage Cutback
Reduced drive torque
• The batteries need recharging.
• The undervoltage parameters are
incorrectly congured.
• A system other than the controller is
draining the battery.
• The battery resistance is too high.
• The battery is disconnected.
• The B+ fuse is blown.
• The main contactor did not close.
Set: The capacitor bank voltage
dropped below the Undervoltage
threshold.
Clear: Address the possible
causes.
2,5
Overvoltage Cutback
Reduced brake torque.
• The regen braking current elevated the
battery voltage.
• The User Overvoltage parameter is
incorrectly congured.
• The battery resistance is too high for the
regen current.
• The battery disconnected during regen
braking.
Note: The controller generates this fault only
during regen braking.
Set: The controller’s capacitor bank
voltage exceeded the Overvoltage
threshold.
Clear: Address the possible
causes.
2,6
Ext 5V Supply Failure
Disable the 5V and 14V supply
The external load impedance on the 5V power
supply is too low.
Set: The power supply’s voltage is
outside the range of 4.5V-6V.
Clear: Adjust the external load and
cycle the keyswitch.
2,7
Ext 14V Supply Failure
Disable the 5V and 14V supply
The external load impedance on the 14V
power supply is too low.
Set: The power supply’s voltage is
outside the range of 12V-16V.
Clear: Adjust the external load and
cycle the keyswitch.
2,8
Motor Temp Hot Cutback
Reduced drive torque
If the Braking Thermal Cutback
Enable parameter is On, regen
braking torque is reduced.
• The motor temperature is at or above
the temperature specied with the
Temperature Hot parameter.
• The Temperature Hot parameter is
incorrectly congured.
Set: The motor temperature is
at or above the Temperature Hot
parameter setting.
Clear: Take one of the following
steps:
• Cool the motor until its
temperature is below the
Temperature Hot parameter
value.
• Adjust the Temperature Hot
parameter.
See Motor Temperature Control
Menu on page 54.
2,9
Motor Temp Sensor Fault
MaxSpeed reduced (LOS,
Limited Operating Strategy)
Motor temperature cutback
disabled.
• The motor thermistor is incorrectly
connected.
• The sensor polarity between pins J1-5
and J1-6 is incorrect.
• The motor temperature and sensor
parameters are incorrectly congured.
See Motor Temperature Control Menu on
page 54.
Set: The resistance of the motor
thermistor input (J1-6) is lower
than 100Ω or greater than 10kΩ.
Clear: Address the possible
causes.

Curtis 1226 Specifications

General

Brand	Curtis
Model	1226
Category	Controller
Language	English