Checking Refrigerant Tubing And Control Cable Connections Between Indoor/Outdoor Units; Setting The Indoor Unit Addresses (Automatic Addresses) - Panasonic GHP Test Run Manual

12. Checking Refrigerant Tubing and Control Cable Connections between Indoor/
Outdoor Units
 In multiple outdoor unit installations with multiple refrigerant circuit lines, verify that control cable connections between
indoor/outdoor units correspond to refrigerant tubing connections.
 Always perform tube connection checks for multiple outdoor unit and multiple system installations that include W Multi
systems.
 This check can be performed even if indoor unit addresses have not yet been set.
 Perform this check using the control board of the outdoor unit with the smallest address.
 Performing the outdoor unit tube connection check
(1) Select the
(2) Use the UP and DOWN keys to select
(3) Press and hold the SET key for 1 second to perform the tube connection check.
(During this time, the setting in progress indicator lights.)
(4) Be aware that one of the outdoor units will be operating while the tube connection check is in progress.
(5) If there are no problems, the setting in progress indicator will turn off after the check is completed.
(6) If a problem is determined during the tube connection check, the "E28" alert code will appear in the 7-segment LED on
the outdoor unit control board. If this occurs, verify proper control cable and refrigerant tube connection between indoor/
outdoor units again.

13. 3. Setting the Indoor Unit Addresses (Automatic Addresses)

 The method for setting the addresses differs depending on indoor unit wiring configurations for the control cables and
power cables.
 The indoor unit addresses can be set automatically using the control board of the GHP outdoor unit with the smallest
address.
In addition, you can set remote controller addresses (for group or individual control) at the same time.
* The outdoor unit with the smallest address refers to the outdoor unit with the smallest number set for its address.
In a multi-system containing a U-20GES3E5 and a U-10MES2E8, U-20GES3E5 is the unit with the smallest address.
Basic wiring diagram: Case 1
 Indoor unit addresses can be set without actually running the outdoor units.
 Perform the procedure for automatic address setting using the outdoor unit with the smallest address (if there is only 1
outdoor unit, perform automatic address setting from that unit)
(See the sections on automatic address setting below.)
(initial settings) menu item to display
If the indoor/outdoor control cables are not connected to other W Multi
units or 3WAY Multi outdoor units (non-linked wiring)
U-20GES3E5 U-10MES2E8
Outdoor
unit
1-1
Tubing
Indoor/outdoor
control cable
Indoor
unit
Remote
controller
Indoor
unit
Fig. 9
Ⅱ－13
(tube connection check).
Outdoor
unit
1-2
Indoor/outdoor control cable
Indoor Indoor Indoor
unit unit unit
Indoor/outdoor control cable
Indoor Indoor Indoor
unit unit unit
.