Table of Contents
Advertisement
resulting in a degraded cooling effect.
- Check the operation conditions (operating time, system and facility ON/OFF control methods,
extent of disaster handling facilities, etc.)
"Table 1.3.1-2" lists the specific check items and examples of failures that occurred in the past.
Environmental
condition
Dust
Temperature
and humidity
Air conditioner
Humidifier
SET0103020
1.3.2 Input power
Confirm the allowable range of input power supplied to the Base Unit. (See "Table 1.3.2".)
Table 1.3.1-2 Check items and examples of past problems
Check item
There should be no electric conductive
matter such as concrete particles or
iron dust under the device floor.
There should be no foreign matter that
may clog the filter.
The temperature, relative humidity,
and maximum wet-bulb temperature
gradient should comply with the
specifications.
The room temperature should be evenly
maintained throughout the room.
A sufficient amount of cool air should
be provided through the floor outlets.
There should be sufficient clearance
under the device floor.
The air velocity should be even.
Only pure water should be used for
ultrasonic humidifiers.
Table 1.3.2 Input power requirements
Input power voltage
200 to 240VAC ±10% single phase
Example of failure
There was a large amount of iron dust
under the device floor, some of which
penetrated the unit and triggered a
failure. Numeral parts had to be replaced.
A plastic bag on the floor was drawn
in and ended up clogging the filter.
Parts were damaged due to the
resulting rise in temperature.
The power could not be turned on
because of high humidity levels in
a new building.
A temperature alarm was triggered
because heat was not dissipated,
because of the poor layout of the air
conditioning for the units.
-
The temperature rose because cables
under the device floor were blocking
the air conditioning inlets.
The air velocity was unusually high
because of installation next to an air
conditioner, which generated an air
wall inside the unit. This caused
the temperature to rise, which in turn
triggered an alarm.
There was a buildup of a white residue
because of the use of tap water, which
resulted in a failure caused by leakage.
Frequency
50/60Hz +2%/-4%
16
Advertisement
Table of Contents
