Sanyo Welder MCO-19M(UVH) User Manual download pdf (Page 61)

TROUBLESHOOTING

If the Incubator does not seem to be working properly, check the following items before calling for service.

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 key is not working.

• Is the key lock function turned OFF?

An alarm has occurred. When starting operation:

• Does the chamber temperature match the set value?

• Does the CO

gas concentration in the chamber match the set

value?

(1) Is the secondary pressure for the CO

gas pressure regulator at the

specified value of 0.03 MPaG (0.3 kgf/cm

G. 4.3 psiG)?

(2) Is the secondary pressure for the N

gas pressure regulator at the

specified value of 0.05 MPaG (0.5 kgf/cm

G, 7.1 psiG)?

(3) Is the gas tube properly connected?

During operation:

• Is the upper limit alarm temperature set at least 1°C higher than the

chamber set temperature?

• Has the temperature setting been changed? Has the 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 be automatically

cleared if you wait.

• Has the gas tube come loose, or is there a gas leak?

• Has the CO

gas concentration setting been changed?

• Is the gas cylinder empty? Check the primary pressure of the gas

cylinder once a week. (When the primary pressure is 3.8 MPa (38

kgf/cm

G) or lower, it is a sign that there is little gas remaining.

Replace the cylinder soon.)

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 gastight split doors or inner door left

open?

The gas concentration does

not match the set value.

• Is the secondary pressure for the CO

gas pressure regulator at the

specified value of 0.03 MPaG (0.3 kgf/cm

G, 4.3 psiG)?

• Is the secondary pressure for the N

gas pressure regulator at the

specified value of 0.05 MPaG (0.5 kgf/cm

G, 7.1 psiG)?

• Is the gas tube blocked?

The chamber temperature

does not rise.

• Is there enough water in the humidifying pan? (Be sure to use sterile

distilled water.)

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Sanyo Welder MCO-19M(UVH) User Manual Page 61

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