Daikin ERSQ 011AAV1, Service Manual

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ESIE09-08 Troubleshooting by Indication on the Remote Controller
Troubleshooting 201
3.58
“U7”
Indoor Unit: Malfunction of Transmission Outdoor
Unit
Remote Control
Display
U7
Subcode 2
Applicable
Models ER*Q 011~016*
Method of
Malfunction
Detection
Microcomputer checks the transmission of outdoor unit.
Malfunction
Decision
Conditions
When transmission is not carried out normally for a certain amount of time
Supposed
Causes
„ Improper connection of transmission wiring between outdoor unit and external control
adaptor for outdoor unit
„ 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
Caution
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
(V2824)
C/H
SELECT is set to “IND”.
Replace the outdoor unit PC
Board (A1P).
YES
Cool/heat selection is
unified.
Set C/H SELECT to “IND”.
NO
NO
C/H SELECT is set to
“MASTER”.
C/H SELECT is set to
“SLAVE”.
Set C/H SELECT to “IND”.
YES
YES
Set C/H SELECT to “IND”.
Replace the outdoor unit PC
board (A1P).
NO
NO
YES
( )
( )
( )
( ) To select “IND”, press the BS2 button (set) till H3P led is on. Then press BS3 button (return) to confirm.