Kohler Curtis AC F2-T User Manual

7 — DIAGNOSTICS AND TROUBLESHOOTING
Curtis AC F2-A, F4-A, F6-A Motor Controllers – FOS 4.5 – April 2022 Return to TOC
pg. 214
Table 24 Fault Code Troubleshooting Chart, cont’d
FLASH
CODE
FAULT NAME
(Curtis Integrated Toolkit™)
POSSIBLE CAUSES SET/CLEAR CONDITIONS FAULT ACTIONS
2-3
0x23
Undervoltage Cutback
Undervoltage_Cutback
0x2121
Fault Type(s): 1
1. Batteries need recharging.
Controller is performance limited
at this voltage.
2. Battery parameters are misadjusted.
3. Non-controller system-drain
on battery.
4. Battery resistance too high.
5. Battery disconnected while driving.
6. Blown B+ fuse or main contactor did
not close.
7. See Programmer » System Monitor
menu » Controller » Cutbacks »
Undervoltage Cutback.
8. See Programmer » System
Monitor menu » Controller »
Capacitor Voltage.
Set: Capacitor bank
voltage dropped below the
Undervoltage Cutback limit with
the FET bridge enabled.
Clear: Bring the capacitor
voltage above the controller’s
Undervoltage Cutback limit.
Reduced drive torque.
Reduced regen braking
torque.
Fault Action:
None, unless a fault action
is programmed in VCL.
Dual Drive
This Motor:
TrimDisable
Other Motor:
TrimDisable
2-4
0x24
Overvoltage Cutback
Overvoltage_Cutback
0x2131
Fault Type(s): 1
1. Normal operation. Fault shows that
regen braking currents elevated
the battery voltage during regen
braking. Controller is performance
limited at this voltage.
2. Battery parameters are misadjusted.
3. Battery resistance too high for
given regen current.
4. Battery disconnected while
regen braking.
5. See Programmer » System Monitor
menu » Controller » Cutbacks »
Overvoltage Cutback.
6. See Programmer » System
Monitor menu » Controller »
Capacitor Voltage.
Set: The controller’s capacitor
bank voltage exceeded the
Overvoltage Cutback limit with
the FET bridge enabled.
Clear: Bring controller’s
capacitor voltage below the
Overvoltage Cutback limit.
Reduced brake torque.
Note: This fault is declared
only when the controller is
running in regen.
Fault Action:
None, unless a fault action
is programmed in VCL.
Dual Drive
This Motor:
TrimDisable
Other Motor:
TrimDisable
2-5
0x25
Ext 5V Supply Failure
Ext_5V_Supply_Failure
0x2531
Fault Type(s):
1 = The 5V supply is outside 5V
± 10%.
2 = The current is outside the
limits dened by:
- Ext_5V_Supply_Min.
- Ext_5V_Supply_Max.
1. External load impedance on the
+5V supply is too low (i.e., a short
circuit).
2. See the System Monitor »
Outputs menu:
External_5V_Supply,
Ext_5V_Current.
.
Set: Triggered by the Fault Type
indicated.
Clear: Reset Controller, or Reset
using the VCL variable Ext_5V_
Output_Enable.
Disables the 5V Supply.
Fault Action:
None, unless a fault action
is programmed in VCL.
2-6
0x26
Ext 12V Supply Failure
Ext_12V_Supply_Failure
0x2532
Fault Type(s):
1 = The 12V supply is outside
12V ± 15%.
2 = The current is outside the
limits dened by:
- Ext_12V_Supply_Min.
- Ext_12V_Supply_Max.
1. External load impedance on the
+12V supply is too low (i.e., a
short circuit).
2. See Programmer » System Monitor
menu » Outputs:
External_12V_Supply,
Ext_12V_Current.
Set: Triggered by the Fault Type
indicated.
Clear: Reset Controller. Or
Reset using the VCL variable
Ext_12V_Output_Enable.
Disables the 12V Supply.
Fault Action:
None, unless a fault action
is programmed in VCL.

Kohler Curtis AC F2-T Specifications

General

Brand	Kohler
Model	Curtis AC F2-T
Category	Controller
Language	English