Daikin ALTHERMA HT EKBUHAA6 V3 - UH Malfunction of System, Refrigerant System Address Undefined

Troubleshooting by Indication on the Remote Controller ESIE09-08A
218 Troubleshooting
3.63 “UH ” Malfunction of System, Refrigerant System Address
Undefined
Remote Control
Display
UH
UH subcode 0
Applicable Models AII indoor unit models
All outdoor unit models
Method of
Malfunction
Detection
Malfunction
Decision Conditions
Supposed Causes  Improper connection of transmission wiring between outdoor unit and outdoor unit outside control
adapter
 Defect of indoor unit PC board (A1P)
 Defect of outdoor unit PC board (A1P)
Troubleshooting
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
(V2831)
NO
YES
Fix incorrect wiring,
push and hold the RESET
button on the master outdoor
unit PC board for 5 seconds.
Normal
NO
Is
electricity
being introduce for
the first time after
installation or after an indoor
or outdoor unit PC
board has been
replaced?
Is
indoor -
outdoor
transmission wiring
normal?
YES
NO
Does a
"UH " malfunction
occur without
subcode “0”?
YES
NO
Does a
malfunction occur
even after 12 minutes
elapses from the time when
electricity is introduced
to indoor and
outdoor
unit?
YES
Replace indoor unit PC board (A1P).
Replace outdoor unit PC
board (A1P).