Daikin Altherma HT Service Manual

Troubleshooting by Indication on the Remote Controller ESIE09-08B
164 Troubleshooting
3.23 “F3 ” Outdoor Unit: Abnormal Discharge Pipe
Temperature
Remote Control
Display
F3
Applicable
Models
ER*Q 011~016*
Method of
Malfunction
Detection
Abnormality is detected according to the temperature detected by the discharge pipe
temperature sensor.
Malfunction
Decision
Conditions
When the discharge pipe temperature rises to an abnormally high level
When the discharge pipe temperature rises suddenly
Supposed
Causes
 Faulty discharge pipe temperature sensor
 Faulty connection of discharge pipe temperature sensor
 Faulty outdoor unit PC board
Troubleshooting
 Refer to “Thermistor Resistance / Temperature Characteristics” table on P239.
Caution
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
(V3068)
Discharge
pipe temperature is
120°C or higher when the unit
stop by malfunction.
Pull out the discharge pipe
thermistor from the outdoor PC
board, and then make
measurement of resistance using
a multiple meter.
Are the
characteristics of the
discharge pipe thermistor
normal?
(3.5~400KΩ)*
Replace outdoor unit PC board
(A1P).
Replace the discharge pipe
thermistor.
NO
NO
Refrigerant shortage, compression
defect, etc. Defect of the refrigerant
system.
YES
YES

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++