Sanyo MCO-19M, Service Manual

Page: 171 / 187

Symptom Items to check and countermeasures
A large quantity of gas is being
consumed.
x
Are the doors being frequently opened and closed?
x
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.
x
Is the packing seal for gastight split doors and inner door
defective?
x
Is the access hole open?
Normal cultures are not possible,
and the gas concentration is
suspect.
x
Is the ambient air environment around the Incubator normal? Is
there a source of polluted gas in the vicinity?
The gas concentration is slow to
recover.
x
A HEPA filter is used for the Incubator gas piping. If gas
concentration is slow to recover when the CO
2
gas concentration is
normal, it is possible that the HEPA filter may be clogged. Consult a
Sanyo representative or agent.
x
Is there little gas remaining in the gas cylinder?
x
Is the secondary pressure for the CO
2
gas pressure regulator at the
specified value of 0.03 MPaG (0.3 kgf/cm
2
G, 4.3 psiG)?
x
Is the secondary pressure for the N
2
/CO
2
gas pressure regulator at
the specified value of 0.05 MPaG (0.5 kgf/cm
2
G, 7.1 psiG)?
x
Is the gas tube blocked?
The gas is not being injected.
x
The control method for the Incubator is the ON-OFF method. Gas
is intermittently injected as the gas concentration in the chamber
approaches the set value. Injections may be stopped for periods of
approximately 60 seconds, but that is not an error.
The outer door does not open. MCO-19M(UVH), or when the optional MCO-HL is installed:
x
When the power is OFF, the electric lock is locked and the outer
door does not open. Either turn ON the power or use the accessory
unlock key to override the electric lock.
x
During decontamination the outer door is electrically locked and
does not open.
H
2
O
2
decontamination cannot be
performed.
x
If the MCO-19M(UV)/19M is being used, is the optional MCO-HL
installed?
x
If the MCO-19M is being used, are the optional MCO-HL and
MCO-19UVS installed?
x
Is the UV lamp burned out? If the UV lamp is burned out, H
2
O
2
decontamination will not be possible.
x
Is the H
2
O
2
Generator cable properly connected?
x
Has the entire bottle of H
2
O
2
Decontamination Reagent been used?
x
Has
the upper limit temperature alarm been set to 50
q
C or higher?
Note: If the problem still has not been solved after trying the above checks and countermeasures, or for
any problems not covered here, contact a Sanyo representative or agent.
- 168 -
61