Daikin VRV IV+ Service Manual page 168

2 | Troubleshooting
2.3.166 U7-24 – Duplication of address setting on multiple DTA104A61,62 installation
2.3.167 U9-01 – Other indoor unit has error
Service manual
168
Trigger
Bad configuration of
option DTA104A61,62
PCB.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check wiring and configuration of option DTA104A61, 62. See option
handbook on Business Portal for more information.
2 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
System mismatch,
non‑compatible indoor
units.
At least one other indoor
unit on same F1-F2 wiring
has an error.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check the indoor units for error codes other than U9‑01. See troubleshooting
in the service manual of the respective indoor unit(s) to solve the error
code(s).
2 Check for improper combination of units. See the combination table in the
Databook for more information. Change the installation with ONLY compatible
type units.
3 Check field setting 1‑10 to count the indoor units, see
4
settings" [ 455]. If less indoor units detected than it should be, check the
indoor unit(s) that have power black‑out or malfunctioning PCB. See service
manual of the respective indoor unit for more information.
Possible cause: Power black‑out or malfunctioning PCB on indoor unit(s).
4 Set field setting 2‑5 of the outdoor unit to 1 to start the indoor units
connected to that outdoor unit on forced fan operation, see
4
settings" [ 455]. If any of these indoor units is NOT operating, check the
Effect
Forced stop.
"3.11 Main
Effect
Forced stop.
Reset
DTA104A61,62 power
reset.
4
PCB" [ 290].
Reset
Auto reset.
"6.9 Field
"6.9 Field
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05