Honeywell Midas User Manual page 100

11 Troubleshooting and Fault Diagnosis
General troubleshooting guide and specific fault code table for the Midas
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Fault
Description
code
m9 Simulated maintenance fault User has generated a simulated fault.
m10
Over range.
m11
User calibration expired.
m12
Cartridge expires soon.
m13
Flow error.
m14
Interferent present.
m15
Temperature near limit.
m16
Baseline fault.
m17 Inhibit timeout.
F39 Simulated fault
F40
Sensor overdosed.
F41
Baseline fault.
F42
Calibration expired.
F43 Cartridge expired.
F44 Cell failure.
F45
Stabilization timeout.
F46
Cartridge analog failure.
F47 Cartridge memory invalid.
F48 Cartridge absent.
F49
Cartridge wrong type.
F80
Temperature limits
exceeded.
F81
Flow fail.
F82 Excessive electrical noise.
Table 11-1. Fault code descriptions.
Condition
A large concentration has been detected. The
Midas requires an independent confirmation that
®
the gas hazard is gone.
The user specified calibration interval has elapsed. Perform zero and span calibrations. Increase span calibration period.
Cartridge is old and will expire soon.
Midas is no longer able to regulate flow (high or
®
low flow condition).
An interferent is degrading the ability of the
Midas to detect gas.
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Temperature within 2 Celsius of limit.
Sensor baseline has drifted.
Transmitter has been in inhibit mode too long.
User has generated a simulated fault.
Sensor has been exposed to high gas
concentrations for long periods.
Sensor baseline has drifted.
Too long since last calibration.
Cartridge is too old.
Cartridge has failed Reflex™ check.
Cartridge has failed to stabilize.
Electronic Failure or gas concentration greater
than full scale.
Checksum error.
No communications.
Cartridge type found to be incorrect after boot-up.
Temperature is outside limits
Flow < 70% of nominal for 15 seconds.
Internal electronics repeatedly noisy.
Midas
Reset simulated fault.
Supply known clean air to the Midas
Replace the cartridge with a new cartridge.
Check filters and pump.
Check pressure at inlet and outlet and assure they are within specification.
(See Section 4.3 Sample and exhaust tubing
Check application.
Check installation environment.
Check for background gas concentration, temperature or humidity fluctuations.
Perform zero calibration. Replace cartridge.
Resume monitoring or increase timeout value.
Reset simulated fault.
Replace cartridge.
Check for background gas concentration, temperature or humidity fluctuations.
Perform zero calibration. Replace cartridge.
Replace or calibrate the cartridge.
Replace cartridge.
Replace cartridge.
If temperature or humidity shocks exist, precondition the cartridge. Check for
background gas concentration. Replace cartridge.
Replace cartridge.
Replace cartridge.
Reseat cartridge. Replace cartridge.
Replace cartridge or press
Check installation environment.
Check filters. Check for kinked tubing, Replace pump.
Check grounding of Midas
Relocate the Midas further from noise sources. Add ferrite inductors to cables.
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11-2
Gas Detector
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gas detector. Please check
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Recovery
and clear this fault.
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calculations)
accept if correct.
'3'
chassis. Check termination of cable shields.
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