QIRF Operation And Maintenance Manual
QIRF Operation Manual
May. 01, 2012
85050-301-000 Rev C
30
6. Troubleshooting
This troubleshooting guide is intended as an aid in identifying the cause of unexpected
behavior and determining whether the behavior is due to normal operation or an internal
or external problem.
SYMPTOMS
PROBABLE CAUSE
SUGGESTED SOLUTION
RS-485
RX LED or
TX LED constantly ON
•
RS-485 bus connection has
problem
•
RS-485 Driver U7 is damaged
•
Controller side RS-485 Driver
has problem
•
Disconnect the Cable to isolate
the problem
•
Replace U7 IC on display board
•
Replace RS-485 Driver in
Controller
In Warm Up Mode too long
•
In Warming up process
•
Temperature sensor broken
•
Heater is broken
•
Wait for the block to warm up
•
Check IR Block Assembly
•
Check IR Block Assembly
Error Report
[PH-DIRTY]
[LP-SHORT] /[LP-OPEN]
[CAL-ERR]
•
IR Source or Lamp Dirty
•
Gas Sample Cell Dirty
•
Signal Fault
•
Drift too much
•
Lamp Short/Open
•
Calibrating Error
•
Other Error
•
Return to Factory
•
Return to Factory
•
Return to Factory
•
Re-zeroing calibration
•
Check IR Block Assembly
•
Recalibration or Adjust POTs or
Check Gas Flow or Use different
calibration gas or Replace weak
IR Source Assembly or Replace
Broken IR Detector Assembly
•
Return to Factory
IR Source LED is constant
ON or OFF, not blinking
•
Main Board has problem
•
Heater is short/Open
•
Check Firmware and Driver
•
Check IR Block Assembly
Reading abnormally high or
low or jumping around
randomly
•
Dirty Sensor Block
•
Excessive moisture
•
Weak IR Source
•
Temperature Sensor Loose
•
Return to Factory
•
Add filter to gas inlet
•
Replace IR Source Assembly
•
Check IR Block Assembly
