Daikin Altherma HT Service Manual

Troubleshooting by Indication on the Remote Controller ESIE09-08B
192 Troubleshooting
3.51 “P1 ” Indoor Unit: High Voltage of Capacitor in Main
Inverter Circuit
Remote Control
Display
P1
Subcode 6
Applicable
Models
All indoor units
Method of
Malfunction
Detection
Malfunction is detected according to the voltage waveform of main circuit capacitor built in the
inverter.
Malfunction
Decision
Conditions
When the aforementioned voltage waveform becomes identical with the waveform of the power
supply open phase.
Supposed
Causes
 Defect of main circuit capacitor
 Improper main circuit wiring
 Defect of indoor unit inverter PC board [A4P (1ø) or A5P (3ø)]
 Imb
alance of phase-to-phase voltages
 Open phase
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
Have the
power supply voltages of
three phases fallen within the range
of rated voltage ±10%?
Make measurement of power
supply voltages between L1 and
L2, L1 and L3, and L2 and L3.
Correct the power supply voltages.
YES
YES
NO
Has the
imbalance of
phase-to-phase voltages
fallen within
±10%?
Correct the power supply voltages.
Replace the inverter PC board assy
[A4P (1
ø) or A5P (3ø)].
NO

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++