Troubleshooting - Phcbi MCO-170M Instrucciones De Operación

TROUBLESHOOTING

If the incubator does not seem to be working properly, check the following items before calling a service
engineer:
Symptom
The incubator does not operate
at all.
An alarm is activated.
The chamber temperature does
not match the set value.
The chamber humidity does not
rise.
The gas density does not match
the set value.
74
Items to check and countermeasures
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.
[When starting operation]
Does the chamber temperature match the set value?
Does the CO /O gas density in the chamber match the set value?
2 2
(1) Is the secondary pressure for the gas regulator of CO
value of 0.03 MPa(G)–0.1 MPa(G) (0.3 kgf/cm
14.5 psi(G))?
(2) Is the secondary pressure for the gas regulator of N
specified value of 0.05 MPa(G)–0.1 MPa(G) (0.5 kgf/cm
7.3 psi(G)–14.5 psi(G))?
(3) 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 /O gas density setting been changed?
2 2
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
is a sign that there is little gas remaining. Replace the cylinder soon).
Is the incubator operating beside an appliance that generates electromagnetic waves?
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?
Is there enough water in the humidifying pan? (Be sure to use sterile distilled water)
Is the secondary pressure for the gas regulator of CO
value of 0.03 MPa(G)–0.1 MPa(G) (0.3 kgf/cm
14.5 psi(G))?
Is the secondary pressure for the gas regulator of N
specified value of 0.05 MPa(G)–0.1 MPa(G) (0.5 kgf/cm
7.3 psi(G)–14.5 psi(G))?
Is the gas tube blocked?
Is the duct securely attached? (See page 28)
Is the fan attached properly? (See page 28)
Is the incubator operating beside an appliance that generates electromagnetic waves?
gas cylinder at the specified
2
2 2
(G)–1 kgf/cm (G), 4.4 psi(G)–
gas (O gas) cylinder at the
2 2
2
(G)–1 kgf/cm
2
(G), 551 psi(G)) or lower
gas cylinder at the specified
2
2 2
(G)–1 kgf/cm (G), 4.4 psi(G)–
gas (O gas) cylinder at the
2 2
2
(G)–1 kgf/cm
2
(G),
2
(G),