Indoor Unit, Outdoor Unit Mismatching Problem; Reversed Piping Or Bad Communication Wiring Detection - Daikin Sky Air Advance RZA200D7Y1B Service Manual

2 | Troubleshooting
2.4.31 UA-00 – Indoor unit, outdoor unit mismatching problem
2.4.32 UF-00 – Reversed piping or bad communication wiring detection
Service manual
40
Trigger
Signal transmission
between outdoor and
indoor unit abnormality.
Improper combination of
outdoor and indoor unit.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check for improper combination of the indoor unit and the outdoor unit. See
the combination table in the Databook for more information.
2 Perform a check of the power supply, connections, wiring,... between the
outdoor unit and the indoor unit. See
Possible cause: Faulty wiring between the outdoor unit and the indoor unit.
3 Perform a check of the main PCB. See
Possible cause: Faulty main PCB.
4 Check that "standby electricity saving mode" is OFF. See installation manual.
Possible cause: "Standby electricity saving mode" is ON, while this mode is
ONLY compatible with Split indoor units.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Reversed piping or bad
communication, wiring
detection.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
1 Check that all stop valves of the refrigerant circuit are open. See
"4.2 Refrigerant circuit" [
Possible cause: Closed stop valve in the refrigerant circuit.
2 Check that the piping and wiring connections of the system are correctly
installed. See "6.3 Piping
Possible cause: Piping and/or wiring mismatch.
Effect
Unit will stop operating.
"4.1 Electrical
"3.9 Main
Effect
Unit will NOT start
operating.
4
137].
4
diagram" [ 156] and
Reset
Power reset via outdoor
unit.
4
circuit" [ 135].
4
PCB" [ 95].
Reset
Manual reset via user
interface.
4
"6.2 Wiring diagram" [
RZA200+250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
151].