Shellab SCO2W-2 - Manual (Page 20)

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1/ confirm that fan is working
2/ check for air leak around CO2 sensor or fan motor shaft
3/ magnetic field interference
4/ door not sealing properly
5/ atmospheric pressure fluctuations
6/ defective Fyrite pump or tubing
7/ CO2 entering chamber too quickly
a- tank pressure too high
b- regulator set wrong
c- restrictor incorrect or missing
8/ electronic problem with CO2 sensor, interface or controller
9/ top of unit exposed to cold air drafts
10/ unit being operated without shadow box cover
11/ electrical interference
– atmospheric or conducted
12/ incubator too heavily loaded
Can't adjust set points or calibration -
"locked up"
1/ turn unit off and on to reset processor in controller
2/ if repeatedly happens, call Customer Service
Feeding continuously or abnormally high
CO2 usage
1/ do decay test: if more than 1% decay in an hour, check for leak : door
gasket tightness, motor inlet to chamber, sensor or probe inlet to
chamber, chamber access tube plugged
2/ check output signal from controller
3/ check solenoid valve for correct operation
4/ leak in plumbing including between regulator and CO2 tank
5/ door being opened too often
Won’t hold calibration – Fyrite reading
varies but display stable
1/ atmospheric pressure fluctuations
2/ top of unit exposed to cold air drafts
3/ unit being operated without shadow box cover in place
4/ condensation collecting on CO2 sensor
5/ CO2 sensor or interface failure
6/ unit incorrectly calibrated, see section 5.4
7/ taking Fyrite reading too soon after the door has been opened
8/ air leak around CO2 sensor mounting plate
Low CO2 alarm activated and nGS (NO
Gas warning) flashing on CO2 display.
CO2 gas supply has been interrupted or run out.
Tank ran out of gas or did not switch over.
Pinched gas line tubing
Severe leak in gas line
Tubing is disconnected from the gas supply..
Low CO2 alarm activated and nGS (NO
Gas warning) flashing on CO2 display.
CO2 gas supply has been interrupted or run out.
Tank ran out of gas or did not switch over.
Pinched gas line tubing
Severe leak in gas line
Tubing is disconnected from the gas supply.
MECHANICAL
Door not sealing
1/ check physical condition of gasket
2/ confirm that door latch pulls door in tightly
3/ assure that gasket is in original location
Motor doesn't move