Fault Diagnosis With Messages In The Alerts Page; Table 8-1. Possible Alerts - Teledyne T750 User Manual

F D
AULT IAGNOSIS WITH
The most common and/or serious instrument failures will result in a warning message being
displayed in the Alerts page. Table 8-1 lists possible Alerts, along with their meaning and
recommended corrective action.
It should be noted that more than two or three warning messages occurring at the same
time is often an indication that some fundamental sub-system (power supply, power
distribution board, motherboard) has failed rather than an indication of the specific failures
referenced by the warnings. In this case, it is recommended that proper operation of power
supplies (see Section 8.4.3), the power distribution board (see Section 9.4.3), and the
motherboard (see Section 8.4.9) be confirmed before addressing the specific warning
messages.

Table 8-1. Possible Alerts

MESSAGE
Config Initialized
Data Initialized
Lamp Driver Warning
MFC Communication
Warning
MFC Pressure Warning
O3 Gen Lamp Temp
Warning
O3 Pump Warning 1
Photo Lamp Temp
Warning
Photo Lamp Stability
Warning
134
M
ESSAGES IN THE
FAULT CONDITION
Configuration and Calibration
data reset to original Factory
state.
Data Storage in DAS was
erased.
The CPU is unable to
communicate with either the
O generator or photometer
3
lamp I 2 C driver chip.
Firmware is unable to
communicate with any MFC.
One of the calibrator's mass
flow controllers internal gas
pressure is
<15 PSIG or >36 PSIG
IZS Ozone Generator Temp is
outside of control range of
48°C ± 3°C.
The photometer pump failed to
turn on within the specified
timeout period (default = 30
sec.).
The photometer lamp temp is
outside range limits.
Value output during the
Photometer's reference cycle
changes from measurement to
measurement more than 25%
of the time.
A P
LERTS AGE
POSSIBLE CAUSES
- Failed Disk on Chip
- User has erased configuration data
- Failed Disk-on-Module.
- User cleared data.
- I C has failed
2
- I
2 C has failed
- One of the MFCs has failed
- Cabling loose or broken between MFC and Motherboard
- Zero or source air supply is incorrectly set up or
improperly vented.
- Leak or blockage exists in the T750's internal pneumatics
- Failed CAL GAS or DILUENT pressure sensor
- No IZS option installed, instrument improperly configured
- O
generator heater
3
- O
generator temperature sensor
3
- Relay controlling the O
generator heater
3
- Entire Power distribution board
- I
2 C Bus
- Failed Pump
- Problem with Power distribution board
- 12 VDC power supply problem
Possible failure of:
- Bench lamp heater
- Bench lamp temperature sensor
- Relay controlling the bench heater
- Entire Power distribution board
- I 2 C Bus
- Hot Lamp
- Faulty UV source lamp
- Noisy UV detector
- Faulty UV lamp power supply
- Faulty ± 15 VDC power supply
083730750B DCN8606