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5
Use the [
VENT MODE] button to select
“
Auto ventilation” or “
Total heat
exchanging ventilation”.
6
After the test run, push
button to
stop a test run.
(Display part is same as procedure 1.)
7
Push
check button to cancel the test run
mode.
([TEST] disappears on the display and the
status returns to a normal.)
• If the test run is performed when the indoor /
outdoor temperature is low, the run may be
stopped for device protection. In this case, use
another air conditioner or the like to raise the
temperature to 20 °C or higher, and then
perform the heating operation.
16
Maintenance
Turn off the breaker before performing maintenance.
Running the Air to Air Heat Exchanger with DX Coil
Unit for a long period causes the filter or heat-
exchanger element to become clogged with dust. If the
filter or heat-exchanger element is clogged, the
ventilation amount is reduced and ventilation effect will
be deteriorated.
Clean the filter and heat-exchanger element regularly
according to the extent of dust accumulation.
WARNING
Before performing maintenance, stop the unit, then
turn off the breaker.
Otherwise, an electric shock or injury may result.
CAUTION
Wear protective gloves when performing
maintenance.
• Otherwise, an injury may result.
Maintenance of the filter and
heat-exchanger element
◆
Filter maintenance (Clean the filter
once or twice a year.)
1
Clean the filter if is indicated on the
remote controller.
2
Press the
button after cleaning the
filter. The indicator disappears.
1
Open the inspection cover.
Enter the ceiling cavity remove the screw of fixed
part of Inspection cover and remove the fixing
lever (support the inspection cover while removing
the lever), then open the inspection cover.
2
Pull out the heat exchanger elements.
Filters are attached to the heat exchanger
element. Hold the handle of the heat exchanger
element, then pull it out.
* 2 heat exchanger elements are equipped with
this unit.
CAUTION
The table below shows the weight of each heat
exchanger element. Handle the heat exchanger
element carefully so as not to drop it.
2
1
Model name
Weight (kg/unit)
Quantity
MMD-VNK502HEX1E
MMD-VN502HEX1E
2.9
2
MMD-VNK802HEX1E
MMD-VN802HEX1E
4.0
2
MMD-VNK1002HEX1E
MMD-VN1002HEX1E
4.0
2
MMD-VNK1002HEX1E2
MMD-VN1002HEX1E2
4.0
2
Inspection cover
Fixing lever
Fixed part of
Inspection cover
Filters
High efficiency
filter
151-EN
152-EN
+00EH99887601-2_01EN.book Page 76 Thursday, September 15, 2016 5:23 PM
