Toshiba MMD-VNK502HEX1E Installation Manual page 77

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.
151-EN
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.)
2
1
Clean the filter if is indicated on the
remote controller.
2
Press the button after cleaning the
filter. The indicator disappears.
– 76 –
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.
Fixed part of
Inspection cover
Inspection cover
Fixing lever
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.
Filters
High efficiency
filter
CAUTION
The table below shows the weight of each heat
1
exchanger element. Handle the heat exchanger
element carefully so as not to drop it.
Model name Weight (kg/unit)
MMD-VNK502HEX1E
2.9
MMD-VN502HEX1E
MMD-VNK802HEX1E
4.0
MMD-VN802HEX1E
MMD-VNK1002HEX1E
4.0
MMD-VN1002HEX1E
MMD-VNK1002HEX1E2
4.0
MMD-VN1002HEX1E2
Quantity
2
2
2
2
152-EN