Manual

Curtis 1243GEN2 Manual, Rev. B

FAULT CODE

The 1243

GEN2 controller has two fault outputs, at Pins 2 and 3, which can

be used to transmit signals to LEDs located on the display panel or on any

remote panel. The fault outputs can be conﬁgured to display faults in two dif

ferent formats: Fault Code format or Fault Category format. The fault code

parameter is used to select the preferred format.

In Fault Code format (fault code parameter On), the two fault outputs

operate independently. When a fault is present, the Fault 1 driver (Pin 2)

provides a pulsed signal equivalent to the fault code ﬂashed by the controller’s

built-in Status LED; the fault codes are listed in Table 8, page 74. The Fault 2

driver (Pin 3) will steadily pull low (to B-) when any fault is present, and can

be used to drive a fault/no-fault LED. When no faults are present, the Fault 1

and Fault 2 outputs will both be high.

In Fault Category format (fault code parameter Off), each combination

of the two fault outputs deﬁnes one of four fault categories. Table 6 lists the

possible faults included in each category.

Note: Alternatively, Pin 2 can be used as a pump meter input, and Pin

3 can be used to interface an external auxiliary enable circuit; see fault output

wiring, page 14.

Table 6 FAULT CATEGORIES

FAULT FAULT 1 FAULT 2

CATEGORY OUTPUT OUTPUT POSSIBLE EXISTING FAULTS

0 HIGH HIGH (no faults present)

1 LOW

HIGH Current Shunt, HW Failsafe, M- Shorted,

Throttle Wiper High or Low, Emergency Reverse

Wiring Fault, Field Winding Open, Contactor

Coil or Field Shorted, Main Contactor Welded or

Missing

HIGH LOW Low Battery Voltage, Overvoltage,

Thermal Cutback

3 LOW

LOW Anti-Tiedown, HPD, SRO, Expired Service Timer

or Disable Timer, Motor Too Hot

3 — PROGRAMMABLE PARAMETERS:

Fault Code Parameters