U7" Indoor Unit: Malfunction Of Transmission Outdoor Unit - Daikin ALTHERMA HT Service Manual

Troubleshooting by Indication on the Remote Controller
3.59 "U7 " Indoor Unit: Malfunction of Transmission Outdoor
Unit
U7
Remote Control
Display
Subcode 2
ER*Q 011~016*
Applicable
Models
Microcomputer checks the transmission of outdoor unit.
Method of
Malfunction
Detection
When transmission is not carried out normally for a certain amount of time
Malfunction
Decision
Conditions
 Improper connection of transmission wiring between outdoor unit and external control
Supposed
Causes
 Improper cool/heat selection
 Improper cool/heat unified address (outdoor unit, external control adaptor for outdoor unit)
 Defect of outdoor unit PC board (A1P)
 Defect of external control adaptor for outdoor unit
Troubleshooting
( ) To select "IND", press the BS2 button (set) till H3P led is on. Then press BS3 button (return) to confirm.
204
adaptor for outdoor unit
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
Caution
C/H
SELECT is set to "IND".
NO
Cool/heat selection is
unified.
YES
C/H SELECT is set to
"MASTER".
NO
C/H SELECT is set to
"SLAVE".
NO
YES
NO
YES
YES
ESIE09-08B
Replace the outdoor unit PC
Board (A1P).
Set C/H SELECT to "IND". ( )
Set C/H SELECT to "IND".
( )
Set C/H SELECT to "IND". ( )
Replace the outdoor unit PC
board (A1P).
(V2824)
Troubleshooting