TELEDYNE API T703U - Troubleshooting with Relay Board Status Leds; Figure 8-3: Relay PCA Status Leds Used for Troubleshooting; Table 8-5: Relay PCA Status LED Failure Indications

General Troubleshooting & Service Teledyne API T703/T703U Calibrator Operation Manual
162
If D1 is blinking, then the other LEDs can be used in conjunction with DIAG
Menu Signal I/O to identify hardware failures of the relays and switches on the
Relay.
Troubleshooting with Relay Board Status LEDs 8.3.2.2.
D15 (Green) - Photometer Lamp Heater
D16 (Green) – O
3
Generator Lamp Heater
D7 (Green) – Photometer Meas/Ref Valve
D9 (Green) – O
3
Pump
D1 (RED)
Watchdog
Indicator
T703U only:
D10 (Green)
O
3
Divert Valve
T703U only: D11 (Green) – O
3
Generator Valve
D2 (Yellow) – Zero Air Pump Option
D8 (Green) – Zero Air Shutoff Valve Option
Figure 8-3: Relay PCA Status LEDs Used for Troubleshooting
Table 8-5: Relay PCA Status LED Failure Indications
LED
INDICATES
ACTIVATED BY
DIAGNOSTIC TECHNIQUE
D2
Yello
w
AC- powered Zero Air Pump
(option) status
ZERO_AIR_PUMP
Pump should start /stop. If not:
 Failed pump
 Failed AC Relay on Relay PCA
 Failed Relay PCA
 Faulty AC Power Supply (PS2)
 Faulty Connectors/Wiring
D7
Green
Photometer Meas/Ref Valve status
PHOTO_REF_VALVE
Valve should audibly change states. If not:
 Failed Valve
 Failed Relay Drive IC on Relay PCA
 Failed Relay PCA
 Faulty +12 VDC Supply (PS2)
 Faulty Connectors/Wiring
D8
Green
Zero Air Shutoff Valve (option) status
ZA_SHUTOFF_VALVE
D9
Green
DC-powered O
3
Pump status
O3_PUMP_ON
Pump should start /stop. If not:
 Failed pump
 Failed Drive IC on Relay PCA
 Failed Relay PCA
 Faulty +12 VDC Supply (PS2)
 Faulty Connectors/Wiring
D10
Green
T703U Divert Valve status
O3_DIVERT_VALVE
Valve should audibly change states. If not:
 Failed Valve
 Failed Relay Drive IC on Relay PCA
 Failed Relay PCA
 Faulty +12 VDC Supply (PS2)
 Faulty Connectors/Wiring
D11
Green
T703U O
3
Generator Valve status
O3_GEN_VALVE
D15
Green
Photometer Heater status
PHOTO_LAMP_HEATER
Voltage displayed should change. If not:
 Failed Heater
07223D DCN7107