32
TROUBLESHOOTING
If the unit malfunctions, check out the following before calling for service.
Malfunction Check/Remedy
The unit does not operate
at all.
•
The unit is not plugged correctly into a power outlet.
•
The circuit breaker at the power source is active or a power failure
has occurred.
The key operation is
disable
•
The key lock function is set in ON mode.
If the alarm function and
the buzzer operates
[At the beginning of operation]
•
The chamber temperature is not equal to the set value.
•
The chamber CO
2
density is not equal to the set value.
a. The secondary pressure of the gas regulator is not equal to the
set value (0.1 MPa(G), 1.0 kgf/cm
2
(G), 14.5 psi(G)).
b. The tube is not connected securely between the gas regulator
and the unit.
[During operation]
•
The upper limit alarm temperature is not set at least 1
o
C higher
than the set chamber temperature.
•
The set temperature value was changed, or the door was left
open for a long period. Or a low temperature load was placed
inside the unit. In this case, if the unit is left as it is, the alarm will
eventually clear itself.
•
The gas tube has slipped off or the gas leaks.
•
The set value of the gas density was changed.
•
The gas cylinder is empty. Check the primary pressure of the
CO
2
cylinder once a week. (The primary pressure of less than 3.8
MPa(G) (38 kgf/cm
2
(G), 551.1 psi(G)) means a little gas in the
cylinder. Replace the cylinder soon.)
•
While an equipment are operated in chamber. (Generation of heat by
the equipment raises temperature in chamber)
If the chamber
temperature is not equal to
the set temperature
•
The ambient temperature must always be at least 5
o
C less than
the set temperature.
If the gas density does not
coincide with the set value
•
The secondary pressure is not set to 0.1 MPa(G) (1.0 kgf/cm
2
(G),
14.5 psi(G)).
•
The gas tube is clogged or chinked.
If the chamber humidity
does not rise
•
The water reservoir is not filled with sterile distilled water.
(Always use sterile distilled water.)
•
The no humidifying mode is set.
If the CO
2
consumption
is too much
•
The door is opened frequently.
•
There is any gas leakage at the connection or pin hole on the
tube. It is recommended to replace the tube once a year.
•
An access port is opened.
If normal cultivation
cannot be done and
chamber gas density is
suspect
•
The environment around the unit is not normal. The source of
the contaminated gas is nearby.
•
The unit is installed in an enclosed space.
If it takes much time to
recover the gas density
•
HEPA filter is provided in the gas piping. If it takes much time to
recover the gas density even though the gas pressure is normal, it
may be that dust on the HEPA filter prevents the gas flow.
Consult the our sales representative or agent.
If CO
2
gas is not
injected
•
The CO
2
injection system is ON-OFF controlled and injects gas
intermittently when the set density is close. Injection might stop for
15 seconds but it is not abnormal.
