Daikin Altherma HT Service Manual

Troubleshooting by Indication on the Remote Controller ESIE09-08B
134 Troubleshooting
3.3 “A9 ” Indoor Unit: Malfunction of Moving Part of
Electronic Expansion Valve (K1E) R-410A circuit
Remote Control
Display
A9
Subcode 0
Applicable
Models
All indoor and outdoor unit models
Method of
Malfunction
Detection
Malfunction
Deci
sion
Conditions
Supposed
Causes
 Malfunction of moving part of electronic expansion valve
 Defect of indoor unit PC board (A1P)
 Defect of connecting cable, bad wire
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
(V2781)
After connecting, turn the power
supply o and then back on.
X7A [1, 2, 3, 4, 5, 6]
Replace the moving part of the
electronic expansion valve.
YES
YES
NO
NO
Replace the connecting cable.
If you turn the power supply o and
turn on again, and it still does not
help, replace the indoor unit PC
board (A1P).
NO
YES
The
electronic
expansion valve is
connected to X7A of the
indoor unit PC
board.
Normal
when coil
check (*1) of the
moving part of the electronic
expansion valve is
checked.
The connecting
cable is short-circuited or
disconnected.

Daikin Altherma HT Specifications

General

Type	Air-to-water heat pump
Refrigerant	R-410A
Water Outlet Temperature	Up to 80°C
Operating Temperature Range	-20°C to 35°C
Power Supply	3-phase, 400V
Energy Efficiency Class (Heating)	A++