Shellab SCO10A-2 - Manual (Page 16)

16
Overshoots set point and continues to rise
- display and Fyrite match
Debris in solenoid causing it to leak continuously
Rises very slowly
1/ Filter overly dirty or partially plugged
2/ Hose kinked or leaking
3/ CO
2
tank regulator set too low.
4/ CO
2
tank near empty
Never rises
1/ CO
2
filter plugged
2/ CO
2
hose blockage
3/ CO
2
tank empty
4/ Set point is at 0.0 and has not been reset.
5/ CO
2
tank regulator not on
Display and Fyrite reading do not match
1/ Old Fyrite fluid.
2/ Out of calibration.
Unstable display
1/ Confirm that fan is working
2/ Magnetic field interference
3/ Electronic problem with CO
2
sensor, interface or controller
4/ Top of unit exposed to cold air drafts
5/ Incubator too heavily loaded
Feeding continuously or abnormally high
CO
2
usage
1/ Do decay test: if more than 1% decay in an hour, check for leak : door
gasket tightness, motor inlet to chamber, sensor and probe inlet to
chamber
2/ 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 CO
2
sensor
5/ CO
2
sensor or interface failure
6/ Unit incorrectly calibrated.
7/ Taking Fyrite reading too soon after the door has been opened
8/ Air leak around CO
2
sensor mounting plate
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
1/ if shaft spins freely: check connections to motor and check voltage to
motor;
2/ if shaft rubs or is frozen, relieve binding and retest
Motor makes noise