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Teledyne API T703/T703U Calibrator Operation Manual General Troubleshooting & Service
171
8.3.2.2. Troubleshooting with Relay Board Status LEDs
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 Pum
p
O
p
tion
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
D8
Green
Zero Air Shutoff Valve (option) status
ZA_SHUTOFF_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
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
D11
Green
T703U O
3
Generator Valve status
O3_GEN_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
D15
Green
Photometer Heater status
PHOTO_LAMP_HEATER
D16
Green
Status of O
3
Generator Heater status
O3_GEN_HEATER
Voltage displayed should change. If not:
Failed Heater
Faulty Temperature Sensor
Failed AC Relay
Faulty Connectors/Wiring
07223C DCN6572