91
TROUBLESHOOTING
If the incubator does not seem to be working properly, check the following items before calling for service.
Problem
Items to be checked and countermeasures
The incubator does not operate
at all.
Is the incubator plugged in?
Is there a power outage, or has a circuit breaker interrupted the power?
Is the removable power supply cord connected to the port on the lower right side of the
cabinet?
An alarm is activated.
[When starting operation]
Does the chamber temperature match the set value?
Does the CO
2
/O
2
gas density in the chamber match the set value?
(1) 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))?
(2) 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))?
(3) Is the gas tube properly connected?
[During operation]
Has the high-limit alarm temperature been set at least 1
C higher than the
temperature set for the chamber?
Has the temperature setting been changed? Has the outer door been left open for a
long time? Has a low-temperature object been placed in the chamber? If any of these
is the case, the alarm will clear automatically after a short time.
Has the gas tube come loose, or is there a gas leak?
Has the CO
2
/O
2
gas density setting been changed?
Is the gas cylinder empty? Check the primary pressure of the gas cylinder once a
week (A primary pressure reading of 3.8 MPa(G) (38 kgf/cm
2
(G), 551 psi(G)) or lower
is a sign that there is little gas remaining. Replace the cylinder soon).
Is the incubator operating beside an appliance that generates electromagnetic waves?
The chamber temperature does
not match the set value.
Is the ambient temperature at least 5
C lower than the temperature set for the
chamber?
Is the outer door closed with the inner door left open?
Is the incubator operating beside an appliance that generates electromagnetic waves?
The chamber humidity does not
rise.
Is there enough water in the humidifying pan? (Be sure to use sterile distilled water.)
The gas density does not match
the set value.
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? (See page 93)
Is the fan attached properly? (See page 93)
Is the incubator operating beside an appliance that generates electromagnetic waves?