Service Support Function; Check Function For Connection Of Refrigerant Pipe And Control Transmission Line - Toshiba HFCR407C Service Manual

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 PC 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
Power ON
System capacity check
Set SW01 on the interface PC 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 PC 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 PC 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 PC 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 PC 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 PC board of the inverter outdoor unit to 1.
Trial operation

Service support function

137
Both outdoor/indoor unit sides
SW01, 02, 03:
SW04, 05:
SW08:
Operation
It takes 15 minutes for 1 system to check if it is correct or
miswired.
*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
SW02 SW03
1 to 16 1
1 to 16 2
1 to 16 3
Completion
Rotary switch
Push switch
Dip switch
Address of indoor unit
Displayed on
7 segment LED [A]
1 to 16
17 to 32
33 to 40
18