Service Support Function - Toshiba MMU-AP0091H Installation Manual

14-2. Service Support Function

14-2-1. Check Function for Refrigerant Pipe and Control Communication Line
This function is provided to check misconnection (Wiring over lines) of the refrigerant pipes and the control
transmission line between indoor unit and outdoor unit by using the switch on the interface P.C. board of the
header unit.
However, be sure to check the following items prior to execute this check function.
1. When a group operation by remote controller is performed and it is used over outdoor
units, this check function does not work.
2. When using this check system, be sure to check for each 1 line in the unit of outdoor
unit. If checking the multiple lines at the same time, misjudgment may be caused.
<Check procedure>
Power ON
System capacity check
Set the rotary switch SW01, SW02, and SW03 on the interface
P.C. board of the header unit to [1], [2] and [3] respectively.
Then the system capacity is displayed on 7-segment display [A].
Check that this display surely matches with the expected
system capacity.
Check No. of outdoor units
Set the rotary switch SW01, SW02, and SW03 on the interface
P.C. board of the header unit to [1], [3] and [3] respectively.
Then No. of outdoor units connected to the system is displayed
on 7-segment display [A]. Check that this display surely
matches with the expected No. of outdoor units.
Check No. of indoor units
Set the rotary switch SW01, SW02, and SW03 on the interface
P.C. board of the header unit to [1], [4] and [3] respectively.
Then No. of indoor units connected to the system is displayed
on 7-segment display [A]. Check that this display surely
matches with the expected No. of indoor units.
Operation mode setup
According to the status of indoor temperature, select one of the
following items for setup of the rotary switches on the interface
P.C. board of the header unit.
Cooling: SW01=[2], SW02=[1], SW03=[1]
Heating: SW01=[2], SW02=[2], SW03=[1]
A
Be sure to turn on the power at outdoor side after power-ON of indoor unit.
(7-segment display)
[A]
[
System HP
(7-segment display)
[A]
[
No. of connected
outdoor units
(7-segment display)
[A]
[
No. of
connected
indoor units
(7-segment display)
Cooling [
Heating [
145
[B]
] [ HP]
[B]
] [C ]
No. of units of
which cooling
thermostat are ON
[B]
] [ P]
[A] [B]
JC ] [ ]
JH ] [ ]
32
SW02 to SW02 to
[2] [1]
(Heating) (Cooling)
18
–10 10 43
Outdoor temperature
[˚C]