Inspection And Maintenance (Guf-50-100Rdh3 Only) - Mitsubishi Electric Fresh Master GUF-100RDH3 Operating Instructions Manual

(2) Lossnay core
Use a vacuum cleaner to suck up the dust and dirt on the exposed
surfaces of the Lossnay cores. Attach a nozzle with a brush to the
vacuum cleaner for this job, and clean the cores by passing the
brush lightly over their exposed surfaces.
Lossnay core
Vacuum cleaner
(with brush attachment)
5. Inspection and Maintenance
If the unit is to be used for prolonged periods of time, please have the following items inspected by an authorized service office at intervals of about
once a year.
Be sure to turn off the breaker of the distribution board before conducting maintenance or inspection.
Part to be inspected
Strainer Inspect for dust clogging.
Inspect for cracks in O-rings.
Humidifying elements Inspect for water leakage from the
surface of each of humidifying
element.
Inspect for dust and particles on the
surface of each humidifying
element.
* Note 1: Replacement O-rings: Commercially available O-rings P22A and P20
* Note 2: A small amount of water may form through dew condensation, but it is not abnormal.
Preparation before cleaning
Mounting screw
Maintenance cover
(for humidifying)
Drain pipe
Discharge valve
DO NOT WASH IN WATER
Lossnay core
Corner
Description of maintenance and inspection
Inspection item
Remove and clean the dust if clogged.
Replace the O-rings if cracked. *Note 1
Replace the humidifying element if water
spurts from its surface. *Note 2
If the air pathway is covered by dust or
particles, carefully clean it using a vacuum
cleaner, or wash it with water by referring to the
cleaning procedure on page 12.
Service valve
Caution:
• Do not use the hard nozzle of the vacuum cleaner.
If may damage the exposed surfaces of the Lossnay cores.
• Under no circumstances should the Lossnay cores be washed in
water.
(3) High efficiency filters (Optional parts)
The high efficiency filters cannot be reused. Always replace with
new filters. For details, consult your dealer.
3. Assembly after cleaning
Bearing in mind the following points, assemble the parts following the
sequence for their removal in reverse.
• Install the air filters so that they are on the Lossnay core side.
• When installing the air filters, take care not to damage the exposed
surfaces of the Lossnay cores.
Action to take
1. Close the service valve to prevent residual water from spatter-
ing.
2. Take a countermeasure against water leakage.
G Water inside the humidifying elements will leak. Place a vinyl
sheet in the ceiling or take another countermeasure to prevent
water leakage.
3. Drain the residual water from the pipe.
G Place a bucket or other container under the discharge valve
and open the valve to collect the residual water in the pipe.
4. Remove the maintenance cover (for humidifying).
G Remove the seven mounting screws, slide the maintenance
cover to the right, and remove it from the potbelly-shaped holes
(six locations for the GUF-50RDH3).
Possible consequence if
maintenance is not
conducted
Unable to humidify
Water leakage
Water leakage
Reduced airflow
Reduced humidifying
power
11