Specifications

Curtis PMC 1223/33, 1225/35, 1227/37 Manual

7 — DIAGNOSTICS & TROUBLESHOOTING

LED DIAGNOSTICS

During normal operation, with no faults present, the Status LED is steadily on. If

the controller detects a fault, the Status LED provides two types of information.

First, it displays a slow flash (2 Hz) or a fast flash (4 Hz) to indicate the severity of

the fault. Slow-flash faults are self-clearing; as soon as the fault is corrected, the

vehicle will operate normally. Fast-flash faults (“❊” in Table 9) are considered to

be more serious in nature and require that the keyswitch (or power enable switch,

if one is used) be cycled to resume operation after the fault is corrected.

Then, after the severity indication has been active for 5 seconds, the Status

LED flashes a 2-digit fault identiﬁcation code continuously until the fault is

corrected. For example, code “4,1”—low battery voltage—appears as:

¤¤¤¤ ¤ ¤¤¤¤ ¤ ¤¤¤¤ ¤

( 4 , 1 ) ( 4 , 1 ) ( 4 , 1 )

The codes are listed in Table 9.

Table 9 STATUS LED FAULT CODES

LED CODES EXPLANATION

LED off no power or defective controller

solid on controller operational; no faults

❊ 1,1 ¤¤ output fault or overcurrent fault

❊ 1,2 ¤¤¤ EEPROM, main contactor, precharge, or

motor voltage fault

1,3 ¤ ¤¤¤ [not used]

1,4 ¤ ¤¤¤¤ [not used]

2,1 ¤¤ ¤ static return to off (SRO) fault

2,2 ¤¤ ¤¤ high pedal disable (HPD) fault

❊ 2,3 ¤¤ ¤¤¤ HPD latching (HPD fault for >5 sec)

2,4 ¤¤ ¤¤¤¤ speed limit pot fault

3,1 ¤¤¤ ¤ emerg. rev. wiring fault (BB wiring check)

3,2 ¤¤¤ ¤¤ electromagnetic brake driver fault

3,3 ¤¤¤ ¤¤¤ throttle fault

3,4 ¤¤¤ ¤¤¤¤ [not used]

4,1 ¤¤¤¤ ¤ battery undervoltage

4,2 ¤¤¤¤ ¤¤ battery overvoltage

4,3 ¤¤¤¤ ¤¤¤ thermal cutback, due to over/under temp

4,4 ¤¤¤¤ ¤¤¤¤ [not used]

❊ = “Fast-flash” fault—must cycle keyswitch or power enable switch to clear.

NOTE: Only one fault is indicated at a time, and faults are not queued up.