Daikin Altherma HT Service Manual

Troubleshooting by Indication on the Remote Controller ESIE09-08B
136 Troubleshooting
3.4 “AE” Indoor Unit: Water Circuit Error
Remote Control
Display
AE
Subcode 0
Applicable
Models
All indoor unit models
Method of
Malfunction
Detection
Malfunction
Deci
sion
Conditions
Supposed
Causes
 Blocked waterflow or heat exchanger (waterside).
 The water circuit has a too high ESP (external static pressure).
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect
connector, or parts damage may be occured.
The water circuit has a too high
ESP compared to the maximum
allowed ESP (see technical
specs). Consider installing an
additional pump with higher
external static pressure in
combination with a balancing
bottle.
Make sure that:
- all valves are open
- water pressure is OK
(0,3bar<P<3bar)
- all air is out of the system
- the waterfilter is clean
YES
NO
NO
YES
Re-install the 3-way valves
correctly
Is
the waterflow or heat
exchanger blocked?
Is the
position of the 3-way
valves OK?
Can be checked
(see A6 error)

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++