Daikin EWYA004D2V3P Installer's Reference Manual page 207

EWAA004~008D + EWYA004~008D
Packaged air-cooled water chillers
and packaged air to water heat pumps
4P688013-1B – 2022.09
Error code
U8-02 Connection with room thermostat lost
U8-03 No connection with room thermostat
U8-04 Unknown USB device
U8-05
File malfunction
U8-06
MMI/bizone kit communication problem
U8-07 P1P2 communication error
U8-09 MMI software version {version_MMI_software} /
Indoor unit [version_IU_modelname]
compatibility error
U8-11
Connection with the Wireless gateway lost
UA-00 Indoor unit, outdoor unit matching problem
UF-00 Reversed piping or bad communication wiring
detection.
NOTICE
When the minimum water flow is lower than described in the table below, the unit
will temporarily stop operation and the user interface will display error 7H‑01. After
some time, this error will reset automatically and the unit will resume operation.
If operation is...
Cooling
Heating
BUH operation
Heating defrost
INFORMATION
If error 89-05 or 89-06 occurs, check the minimum water volume during cooling.
INFORMATION
If an U8‑04 error occurs, the error can be reset after a successful update of the
software. If the software is not successfully updated then you must make sure that
your USB device has the FAT32 format.
INFORMATION
If the booster heater overheats and is disabled by the thermostatic safety, the unit
will not give an error directly. Check if the booster heater is still in operation if you
experience one or more of the following errors:
▪
Powerful operation takes a very long time to heat up and the error code AJ-03 is
displayed.
▪
During anti-legionella operation (weekly), the error code AH-00 is displayed
because the unit cannot reach the requested temperature required for tank
disinfection.
15 Troubleshooting
|
Description
Then the minimum required flow rate
is...
10 l/min
6 l/min
12 l/min
12 l/min
Installer reference guide
207