2.3.135 U7-06 - Multi System Address Abnormality; U7-07 - More Than 3 Outdoor Units On Q1-Q2 Transmission; U7-11 - Excess Indoor Units Detected On Test Run; U7-24 - Duplication Of Address Setting On Multiple Dta104A61,62 Installation - Daikin VRV IV+ Service Manual

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5 Check that ONLY the master outdoor unit has F1‑F2 IN
connection. If another outdoor unit has F1‑F2 IN connection,
correct the installation.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.135 U7-06 – Multi system address abnormality
Trigger Effect
Main PCB on main Forced stop.
outdoor unit detects
transmission
abnormality on a
multi installation.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Check the Q1‑Q2 communication between the outdoor units.
See "4.1 Electrical circuit" on
Possible cause: Faulty or interruption in communication
between outdoor units.
2 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
3 Check that ONLY the master outdoor unit has F1‑F2 IN
connection. If another outdoor unit has F1‑F2 IN connection,
correct the installation.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.136 U7-07 – More than 3 outdoor units on Q1-
Q2 transmission
Trigger Effect
More than 3 outdoor Forced stop.
units are detected on
Q1-Q2 transmission
line.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Maximum 3 outdoor units are allowed in the installation.
Change the installation if needed.
2 Check the Q1‑Q2 communication between the outdoor units.
See "4.1 Electrical circuit" on
Possible cause: Faulty or interruption in communication
between outdoor units.
3 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
RYYQ+RYMQ+RXYQ8~20U7Y1B
VRV IV+ Heat Pump
ESIE18-14 – 2019.07
Reset
Auto reset.
page 130.
"3.9 Main PCB" on
Reset
Power reset at
outdoor unit.
page 130.
"3.9 Main PCB" on
2.3.137 U7-11 – Excess indoor units detected on
test run
Trigger Effect
Test run detects more Forced stop.
than allowed amount
of indoor units or
indoor unit total
index.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed
order.
1 Check total index and total count for indoor units. See Data
book on Business Portal for more information.
2 Perform a check of the main PCB. See
page 106.
Possible cause: Faulty main PCB.
3 Check the F1‑F2 transmission line between the indoor units and
outdoor unit. See "4.1 Electrical circuit" on
Possible cause: Faulty or interruption in transmission line
between indoor units and outdoor unit.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.138 U7-24 – Duplication of address setting on
multiple DTA104A61,62 installation
Trigger Effect
Bad configuration of Forced stop.
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
page 106.
Possible cause: Faulty main PCB.
INFORMATION
If all procedures listed above have been performed and the
problem is still present, contact the helpdesk.
2.3.139 U9-01 – Other indoor unit has error
Trigger Effect
System mismatch, Forced stop.
non‑compatible
indoor units.
At least one other
indoor unit on same
F1-F2 wiring has an
error.
2 Troubleshooting
Reset
Auto reset.
"3.9 Main PCB" on
page 130.
Reset
DTA104A61,62
power reset.
"3.9 Main PCB" on
Reset
Auto reset.
Service manual
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