Daikin Altherma HT Service Manual

Troubleshooting by Indication on the Remote Controller ESIE09-08B
144 Troubleshooting
3.11 “CJ ” Indoor Unit: Malfunction of Thermostat Sensor in
Remote Controller
Remote Control
Display
CJ
Subcode 0
Applicable
Models
AII indoor unit models
Method of
Malfunction
Detection
Malfunction detection is carried out by temperature detected by remote control air temperature
thermistor.
Malfunction
Decision
Conditions
When the remote control air temperature thermistor becomes disconnected or shorted while the
unit is running.
Supposed
Causes
 Defect of remote control thermistor
 Defect of remote control PC board
 Defect of indoor PC board (A1P)
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
(V2787)
Turn power supply OFF, then
power ON again.
Is "CJ" displayed
on the remote control?
YE S
NO
Replace remote control.
Turn power supply OFF, then
power ON again.
YE S
NO
Normal operation.
Replace indoor unit
PC Board (A1P).
Is “CJ” displayed
on the new remote
control?
External factor other than
equipment malfunction
(for example noise, etc.)

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++