EST EST3X - Page 229

Chapter 7: Service and troubleshooting
EST3X Technical Reference Manual 219
Device
Trouble tab message Possible cause Possible solution
Thermal value too low
The base is bad. Replace the base.
A/D converter fault
The A/D converter is
defective.
Replace the detector.
EEPROM
checksum error The EEPROM is bad. Replace the detector.
EEPROM
write time out The EEPROM is bad. Replace the detector.
Unknown device type
The EEPROM is bad. Replace the detector.
EEPROM
write verify fault The EEPROM is bad. Replace the detector.
Ambient light too high
• The detector is dirty.
• Outside light is reaching
the detector chamber.
• Clean the detector.
• Eliminate light source.
Photo quiescent too high
The detector is dirty. Clean the detector.
Photo quiescent too low
The detector is dirty. Clean the detector.
Photo value too high
The base is bad. Replace the base.
Max. quiescent value
thr
eshold optical sensor
exceed
– dirtied
The detector is dirty. Clean the detector.
Min. quiescent value threshold
optical sensor exceed
– dirtied
The photo sensor reading is
too low.
From the control panel, reset the
panel. If the trouble recurs after
68 minutes, replace the detector.
Filtered optical test too big
• The detector is dirty.
• A light source noise is
affecting the detector.
• Clean the detector.
• Eliminate the light source
noise or move the detector.
Filtered optical test is too small
The photo sensor reading is
too low.
From the control panel, reset the
panel. If the trouble recurs after
2 seconds, replace the detector.
Filtered thermal too big
The thermistor is bad,
causing a high heat sensor
reading. (Note: A heat alarm
occurs prior to the trouble.)
Replace the detector.
Filtered thermal too small
The thermistor is bad,
causing a low heat sensor
reading.
Replace the detector.
CO communication trouble
UART
There is no communication
between the SIGA2 detector
and CO sensor.
Open the SIGA2 detector and
make sure the CO module is
properly seated.
CO sensor failure
The SIGA2 detector CO
module failed supervision.
From the control panel, reset the
panel. If the trouble recurs after
44 seconds replace the detector.
CO end of life
The SIGA2 detector CO
module has reached its end
of life.
Replace the module.