70
TROUBLESHOOTING
If the incubator does not seem to be working properly, check the following items before calling a service
engineer:
Symptom
Items to check 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?
The removable power supply cord is connected to the port attached 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
gas density in the chamber match the set value?
(1) 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))?
(2) Is the gas tube properly connected?
[During operation]
Is the high-limit alarm temperature set at least 1
C higher than the chamber set
temperature?
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
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 less than 5
C different from the set value for the chamber
temperature?
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 CO
2
gas density does not
match the set value.
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 humidifying pan full of sterile distilled water?
Is the duct securely attached? (See page 23)
Is the fan attached properly? (See page 23)
Is the incubator operating beside an appliance that generates electromagnetic waves?
A large quantity of CO
2
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 defective?
Is the access hole open?
