Lc" Outdoor Unit: Malfunction Of Transmission Between Inverter And Control Pc Board - Daikin ERSQ 011AAV1 Service Manual

ESIE09-08
3.46 "LC " Outdoor Unit: Malfunction of Transmission between
Inverter and Control PC Board
LC
Remote Control
Display
Applicable
ER*Q 011~016*
Models
Method of
Check the communication state between inverter PC board and control PC board by micro-
computer.
Malfunction
Detection
Malfunction
When the correct communication is not conducted in certain period.
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Malfunction of connection between the inverter microcomputer and outdoor control
microcomputer
Defect of outdoor unit PC board (A1P) or inverter PC board (A2P).
External factor (Noise etc.)
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
Caution
Are the
connectors of the
NO
inverter PC board and the
control PC board securely
connected?
YES
Are there
any broken wires in
YES
the connectors of the
inverter PC board and
the control PC
board?
NO
Troubleshooting by Indication on the Remote Controller
Connect a connecting wire, and
then restart operation.
Repair the broken wires, and then
restart operation.
Replace the inverter PC board (A2P)
or the control PC board (A1P).
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