68
TROUBLESHOOTING
Symptom
Items to check and countermeasures
Normal cultures are not possible,
and the CO
2
gas density is
suspect.
Is the ambient air environment around the incubator normal? Is there a source of polluted
gas in the vicinity?
CO
2
gas is not being injected.
CO
2
control for the incubator follows the ON-OFF method. CO
2
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 sufficiently
stable, approximately 1 hour after turning ON the power switch or recovering from power
failure.
The CO
2
gas density is slow to
recover.
A HEPA filter is used for the incubator CO
2
gas piping. If gas density is slow to recover
when the CO
2
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 CO
2
gas cylinder?
Is the secondary pressure for the gas regulator 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 gas tube blocked?
Is the duct securely attached? (See page 24)
Is the fan attached properly? (See page 24)
UV lamp lights when the outer
door is open.
Is something pushing against 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 unlock key to override the electric lock.
During decontamination the outer door is electrically locked and does not open.
H
2
O
2
decontamination cannot be
performed.
If the MCO-230AICUVL is being used, are the optional MCO-HP, the optional
MCO-170HB, and the MCO-170EL installed?
If the MCO-230AICL is being used, are the optional MCO-170UVS, the MCO-HP, the
optional MCO-170HB, and the MCO-170EL installed?
Is the UV lamp burned out?
Is the H
2
O
2
generator cable properly connected?
Has the entire bottle of the H
2
O
2
reagent been used up?
In H
2
O
2
decontamination cycle,
“Err34:H2O2
Volume”
is
activated.
Is the duct securely attached? (See page 24)
Is the fan properly attached? (See page 24)
Is the H
2
O
2
generator securely installed? (See page 50)
Has the H
2
O
2
generator reached the end of its life? If the total operating time exceeds
5,000 hours, replace the H
2
O
2
generator.
