38
Curtis 1220 Manual, Rev. C
Table 4 TROUBLESHOOTING CHART
FLASH
CLEAR STEER TRACTION
CODE
NAME
POSSIBLE CAUSE
CONDITION
FAULT ACTION
FAULT ACTION
12 Controller 1. Steer motor wires shorted. Cycle KSI. Shutdown. Stop.
Overcurrent 2. Controller defective.
13 Current Sense 1. Controller defective. Cycle KSI. Shutdown. Stop.
Fault
14 Precharge Fault 1. Controller defective. Cycle KSI. Shutdown. Stop.
15 Controller 1. Controller is operating in extreme Bring heatsink Warning Only. No action.
Severe low temperature environment. temperature
Undertemp 2. Temperature sensor broken. above -35°C.
16 Controller 1. Excessive load on vehicle. Cycle KSI. Warning then Stop.
Severe 2. Controller is operating in an extreme Shutdown.
Overtemp high temperature environment.
3. Improper mounting of controller..
17 Severe 1. Battery or battery cables or battery Cycle KSI. Shutdown. Stop.
Undervoltage connections defective.
2. Excessive non-controller hydraulic
system drain on battery.
3. Battery discharged or improper battery.
18 Severe 1. Battery or battery cable resistance Cycle KSI. Shutdown. Stop.
Overvoltage too high for a given regen current.
2. Battery disconnected while regen braking.
21 Motor Temp 1. Excessive load on vehicle. Bring estimated Warning and No action.
Hot Cutback 2. Controller is operating in an extreme steering motor reduced current
high temperature environment. temperature back limit.
within range.
22 Controller 1. Excessive load on vehicle. Bring heatsink Warning Only. Speed reduced.
Overtemp 2. Controller is operating in an extreme temperature
high temperature environment. below 85°C.
3. Improper mounting of controller.
23 Motor 1. Motor polarity reversed. Cycle KSI. Shutdown. Stop.
Polarity Fault 2. Position feedback device polarity reversed.
24 5V Output 1. +5V output overloaded. Cycle KSI. Hold then Stop.
Failure 2. Controller defective. Shutdown.
31 Main Driver 1. Internal relay coil is broken. Cycle KSI. Warning then Stop.
Fault 2. Internal relay driver is open or shorted. Shutdown.
32 Relay Welded 1. Internal relay welded. Cycle KSI. Shutdown. Stop.
2. Controller defective.
33 Relay Did Not 1. Internal relay was commanded to close Cycle KSI. Shutdown. Stop.
Close but it did not.
2. Internal relay tips oxidized.
34 Hardware 1. Hardware error detected. Cycle KSI. Shutdown. Stop.
Fault 2. Motor voltage out of range.
3. IIC communication failed.
4. Power MOSFETs shorted.
6 — DIAGNOSTICS & TROUBLESHOOTING
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