Gas Flow Problems; Table 11-2: Relay Board Status Leds - Teledyne 200E Instruction Manual

Model 200E Instruction Manual
LED Color
LED Row 1 (center of board)
D1 red Watchdog Circuit; I
operation.
D2 yellow Relay 0 - reaction cell
heater
D3 yellow Relay 1 - NO
heater
1
D4 yellow Relay 2 - manifold heater
2
D7 green Valve 0 - zero/span valve
status
2
D8 green Valve 1 - sample/cal valve
status
D9 green Valve 2 - auto-zero valve
status
D10 green Valve 3 - NO/NO
status
LED Row 2 (top of board)
D5 yellow Relay 3 - IZS heater
D6 yellow Relay 4 – (O
200EH/EM)
D11 green Valve 4 – Spare
D12 green Valve 5 – Spare
D13 green Valve 6 – Spare
D14 green Valve 7 – Spare
D15 green Mosfet1/DC driver-Unused
D16 green Mosfet2/DC driver -Unused
1
Special configurations only
2
Only active for instruments with Z/S valve or IZS options installed

11.2. Gas Flow Problems

The M200E has two main flow paths, the sample flow and the flow of the ozone supply air.
With IZS or zero/span valve option installed, there is a third (zero air) and a fourth (span
gas) flow path, but either one of those is only controlled by critical flow orifices and not
displayed on the front panel or stored to the iDAS. The full flow diagrams of the standard
configuration and with options installed (Appendix D, document 04574) help in trouble-
shooting flow problems. In general, flow problems can be divided into three categories:
• Flow is too high
• Flow is greater than zero, but is too low, and/or unstable
044100102 Rev A

Table 11-2: Relay Board Status LEDs

Function Fault Status
2
C bus Continuously
ON or OFF
Continuously
ON or OFF
converter Continuously
2
ON or OFF
Continuously
ON or OFF
Continuously
ON or OFF
Continuously
ON or OFF
Continuously
ON or OFF
valve Continuously
x
ON or OFF
Continuously
ON or OFF
sensor heater N/A
2
N/A
N/A
N/A
N/A
N/A
N/A
Troubleshooting & Repair
Indicated Failure(s)
Failed or halted CPU; faulty
motherboard, keyboard, relay
board; wiring between mother-
board, keyboard or relay board; +5
V power supply
Heater broken, thermistor broken
Heater broken, thermocouple
broken
Heater broken, thermistor broken
Valve broken or stuck, valve driver
chip broken
Valve broken or stuck, valve driver
chip broken
Valve broken or stuck, valve driver
chip broken
Valve broken or stuck, valve driver
chip broken
Heater broken, thermistor broken
N/A
N/A
N/A
N/A
N/A
N/A
N/A
195