Toshiba MM-A0160HX, Service Manual

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18
Trial Operation
Service Support Function
Check function for connection of refrigerant pipe and control transmission line
This function is provided to check misconnection of the refrigerant piping and the control
transmission line between indoor and outdoor units by the switch on interface
P.C. board of the inverter type outdoor unit.
However, be sure to check items described below before implementing this check function.
1. When group operation of the remote controller is performed and the connected
outdoor units are used, check function does not work.
2. Use this check system to check lines one by one in single outdoor unit. If checking
multiple lines at the same time, error may occur.
Check Procedure
SW02 SW03
Address of indoor unit
Displayed on
7 segment LED [A]
1 to 16 1 1 to 16
1 to 16 2 17 to 32
1 to 16 3 33 to 40
System capacity check
Set SW01 on the interface P.C. board of the inverter
outdoor unit to "1", SW02 to "2", and SW03 to "3" .The
system capacity is displayed on the 7 segment LED [A].
Check that this display is consistent with the expected
system capacity.
Check No. of outdoor units
Set SW01 on the interface P.C. board of the inverter
outdoor unit to 1, SW02 to 3, and SW03 to 3. The No.
of outdoor units (including inverter unit)connected to the
system is displayed on the 7 segment LED [A]. Check
that this display agrees with the expected No. of
outdoor units.
Check No. of indoor units
Set SW01 on the interface P.C. board of the inverter
outdoor unit to 1, SW02 to 4, and SW03 to 3. The No.
of indoor units connected to the system is displayed on
the 7 segment LED [A]. Check that this display is
consistent with the expected No. of the indoor units.
Set the switch on the interface P.C. board of the inverter
outdoor unit to the following value.
SW01 to 2, SW02 to 1, SW03 to 1: Cooling operation
Push the push-switch SW04 on the interface P.C. board
of the inverter outdoor unit for 2 seconds or more.
Check that display of the 7 segment LED [B] is CC in
cooling operation.
After 15 minutes, check the 7 segment LED [B] display
which will be the No. of indoor units misconnected.
(If no unit is misconnected, 00 is displayed. *1)
Then, check the check code by setting SW01 to 5, SW02
and SW03 in order of address (*2). If any switch is set to
address of the misconnected indoor unit, 9A is displayed
on 7 segment LED [B].
After check, return display select switches SW01, SW02,
and SW03 on the interface P.C. board of the inverter
outdoor unit to 1.
*1 In No. of units displayed on the
7 segment, No. of indoor units which
send the check code are also counted
other then No. of miswired units, so
check the check code.
*2
Both outdoor/indoor unit sides
Operation
It takes 15 minutes for 1 system to check
if it is correct or miswired.
Completion
7 Segment LED
[A]
7 Segment LED
[B]
SW01, 02, 03: Rotary switch
SW04, 05: Push switch
SW08: Dip switch
Power ON