Valve Driver Pca Status Leds; Figure 9-4: Valve Driver Pca Status Leds Used For Troubleshooting; Figure 10-5: Relay Pca; Table 9-6: Valve Driver Board Watchdog Led Failure Indications - Teledyne T700 Operation Manual

Teledyne API – Model T700 Dynamic Dilution Calibrator

9.3.3. VALVE DRIVER PCA STATUS LEDS

CAL GAS
VALVE 1
CAL GAS
VALVE 2
CAL GAS
VALVE 3
CAL GAS
VALVE 4

Figure 9-4: Valve Driver PCA Status LEDS Used for Troubleshooting

Table 9-6: Valve Driver Board Watchdog LED Failure Indications

LED
D1
(Red) (Watchdog Circuit)
LED
D3
Cal Gas CYL1
D4
Cal Gas CYL2
D5
Cal Gas CYL3
D6
Cal Gas CYL4
Purge Valve
D9
Diluent Valve
D10
06873E DCN7106
The Signal I/O submenu also includes VARS that can be used to turn the various input
gas valves on and off as part of a diagnostic investigation.
Function Fault Status
Continuously ON
2
I C bus health
Continuously OFF

Table 9-7: Relay PCA Status LED Failure Indications

ACTIVATED BY SIGNAL
FUNCTION
I/O PARAMETER
CYL_VALVE_1
CYL_VALVE_2
CYL_VALVE_3
CYL_VALVE_4
PURGE_VALVE
Status
INPUT_VALVE
Status
WATCHDOG INDICATOR
 Failed/Halted CPU
 Faulty motherboard, valve driver board or relay PCA
or
 Faulty connectors/wiring between motherboard, valve
driver board or relay PCA
 Failed/faulty +5 VDC power supply (PS1)
DIAGNOSTIC TECHNIQUE
Valve should audibly change states and
LED should glow.
If not:
 Failed valve
 Failed valve driver IC on relay PCA
 Failed valve driver board
 Faulty +12 VDC power supply (PS2)
 Faulty connectors/wiring
Troubleshooting and Service
PURGE
VALVE
DILUENT
VALVE
Indicated Failure(s)
241