96
TROUBLESHOOTING
Symptom
Items to check and countermeasures
A large quantity of gas is being
consumed.
Are the outer and inner doors being frequently opened and closed?
Check whether gas is leaking from connectors due to deterioration of the gas tube, or
whether there may be any pinhole leaks. The gas tube is a replaceable part, and it is
recommended that it be replaced once a year.
Is the packing seal for the inner door or the gastight split doors defective?
Is the access hole open?
Normal cultures are not possible,
and the gas density is suspect.
Is the ambient air environment around the incubator normal? Is there a source of polluted
gas in the vicinity?
Gas is not being injected.
The CO
2
/O
2
control method for the incubator is the ON-OFF method. Gas is intermittently
injected as the gas density in the chamber approaches the set value. Injections may be
stopped for periods of approximately 15 seconds, but that is not an error.
The gas is not injected until the temperature of the CO
2
sensor becomes stable enough
approx. 1 hour, after turning ON the power switch or recovering from power failure.
The gas density is slow to
recover.
A HEPA filter is used for the incubator gas piping. If gas density is slow to recover when
the gas pressure is normal, it is possible that the HEPA filter may be clogged. Contact our
sales representative or agent.
Is there little gas remaining in the gas cylinder?
Is the secondary pressure for the gas regulator of CO
2
gas cylinder at the specified value
of 0.03 MPa(G)~0.1 MPa(G) (0.3 kgf/cm
2
(G)~1 kgf/cm
2
(G), 4.4 psi(G)~14.5 psi(G))?
Is the secondary pressure for the gas regulator of N
2
gas (O
2
gas) cylinder at the
specified value of 0.05 MPa(G)~0.1 MPa(G) (0.5 kgf/cm
2
(G)~1 kgf/cm
2
(G), 7.3 psi(G)~
14.5 psi(G))?
Is the gas tube blocked?
Is the duct securely attached? Attach the duct properly to the 4 points hooks. (Fig. 1 on
next page)
Is the fan attached properly? Confirm if the fan is pushed all the way to the motor shaft.
(Fig. 2 on next page)
UV lamp lights when the outer
door is open.
Does something push the door switch?
The outer door does not open.
When the optional MCO-170EL is installed:
When the power switch is OFF, the electric lock is locked and the outer door does not
open. Either turn ON the power switch or use the accessory unlock key to override the
electric lock.
During decontamination the outer door is electrically locked and does not open.
