Toshiba MMY-MUP0721FT6P-UL Service Manual page 174

(1) Cooling test operation function
This function is provided to change collectively the mode of all the indoor units connected to the same system
for the cooling test operation mode, by using switches on the interface board of the header unit.
<Operation procedure>
[1]
Set SW01/SW02/SW03 on the interface P.C. board of the header unit
to [2/5/1]. ([C. ] is displayed on 7-segment display [A].)
[2]
Push SW04 on the same board for 2 seconds or more.
[3]
[Test run] is displayed on the remote controller of
the indoor unit to be operated.
Check that [ – C] is displayed on 7-segment
display [B] on the interface P.C. board of the
header unit.
[4]
Return SW01/SW02/SW03 on the interface P.C. board of the header
unit to [1/1/1],
or push the push-switch SW05 for 2 seconds or more.
Interface P.C. board
NOTE) The test operation returns to the normal operation after 60 minutes.
• The test run is a forced run that ignores the set temperature. Be sure to stop the test run after work,
paying attention to the room temperature.
• After 60 minutes, the test run will be completed to protect the equipment, and the normal operation will
be started according to the set temperature.
However, if there is no remote controller (using a Central controller), please manually stop the test run
after 60 minutes because there are some type of indoor unit that will continue operating test run even
after 60 minutes.
Power ON
Push switch
7-segment
display [A]
Be sure to turn on power at the indoor side
before power-ON of outdoor unit.
[A] [B]
[C. ] [ – C]
SW04 SW05
SW01 SW02
Rotary switches
- 174 -
Start
Operation check
Stop/End
SW06
7-segment
display [B]
SW03