Daikin VRV IV+ Service Manual page 163

2.3.159 U7-02 – Transmission abnormality between systems - DTA104A61,62 error
REYQ8~20+REMQ5U7Y1B
VRV IV+ Heat Recovery
ESIE18-15B – 2020.05
Trigger
Conflict in settings and
configuration for
DTA104A61,62.
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" [
Possible cause: Faulty or interruption in communication between outdoor
units.
2 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
3 Check wiring and configuration of option DTA104A61, 62. See option
handbook on Business Portal for more information.
4 Check the F1‑F2 OUT transmission line between the outdoor unit main PCB
and option PCB DTA104A61, 62. See
Possible cause: Faulty or interruption in transmission line between outdoor
unit and option DTA104A61, 62.
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.
6 Check if low noise operation or demand control is active without an optional
DTA104A61,62 PCB. Field setting 2‑12 CANNOT be set to 1 if DTA104A61,62 is
not present, see "6.9 Field
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Transmission error on
DTA104A61,62
initialization.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check if multiple units are wired to the same cool/heat zone without cool/
heat master set. One main PCB needs to be set cool/heat master (field setting
2‑0 = 1) while all other units need to be set sub (field setting 2‑0 = 2). See
"6.9 Field settings" [
Effect
Unit keeps running.
4
356].
"3.11 Main
"4.1 Electrical
4
settings" [ 455].
Effect
Forced stop.
4
455].
2 Troubleshooting
|
Reset
Auto reset when correct
settings apply on
DTA104A61,62.
4
PCB" [ 290].
4
circuit" [ 356].
Reset
Auto reset.
Service manual
163