Diagnostic And Output Leds - Compac CNG Service Manual

Diagnostic and Output LEDs

Diagnostic and Output LEDs
Diagnostic LED
Output LED
Compac Industries Ltd.
The diagnostic and output LEDs indicate the operational state of the
dispenser.
The diagnostic LED D18 flashes in three different states when the
processor is working properly, as outlined in the table below.
State
LED Flashes
1 Slowly and
consistently.
2 Slowly but
erratically.
3 Quickly.
The 10 output LEDs (D8-D17) pictured correspond to the output triacs,
which engage power terminals (T1-T10).
When the output triac switches on and engages a power terminal, the
corresponding output LED lights up. When the power is disengaged, the
LED is not lit.
The output LEDs can be used to troubleshoot problems with the
components supplied by the power terminals.
The table below outlines which LED is associated to which power terminal
and the component that it controls.
LED Power Terminal
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
The Solid State Relays (Triacs) Layout and Function part of the C4000
Supply Board section (see page 92) show the physical locations of triacs
and power terminals.
Page 72
When
The hose is idle and in stand-
alone mode.
The hose is idle and
communicating with a
Controller.
Start button is being pressed
or the nozzle has been lifted
from its holster.
Component Controlled
T1 Solenoid Low Bank Side A.
T2 Spare.
T3 Solenoid Medium Bank Side A.
T4 Solenoid High Bank Side A.
T5 Spare.
T6 Solenoid Low Bank Side B.
T7 Solenoid Medium Bank Side B.
T8 Finished dispensing. (Turns off
when the nozzle is stowed.)
T9 Solenoid High Bank Side B.
T10 Error indication.
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Indicator LEDs