34
Curtis 1212S Manual,
Rev. B
4, 1
Current Sense
1. Short in motor or in motor wiring.
Opens bridge and main relay Correct fault;
Fault
2. Controller failure.
and drops brake if current
cycle KSI.
sense >high threshold or
<low threshold.
4, 2
Hardware Failsafe
1. Motor voltage does not correspond
Opens motor and main relay Correct fault;
to throttle request.
and drops brake.
cycle KSI.
2. Short in motor or in motor wiring.
3. Controller failure.
4, 3
EE Checksum
1. EEPROM failure or fault.
Bridge is shorted and throttle Must use programmer
Fault
set to zero.
to clear, as follows:
select Program menu,
alter data value of any
parameter, cycle KSI.
4, 5
Battery Disconnect
1. Battery not connected.
Will short the bridge and
Correct fault;
Fault
2. Poor connection to battery terminals. disable the EM brake driver.
cycle KSI.
5, 1
Low BDI
1. The battery discharge falls below
Vehicle speed is limited to a
Correct fault.
the programmed threshold.
programmed value after BDI
2. The lift lockout input signal
falls below the programmed
(pin J1-9) is active.
threshold.
Table 2 TROUBLESHOOTING CHART, cont’d
CODE
FAULT
POSSIBLE CAUSES
EFFECT OF FAULT
RECOVERY
7 — DIAGNOSTICS & TROUBLESHOOTING
