Daikin EHYHBH05AAV3 Service Manual page 82

Troubleshooting
1.6.3 System Malfunction
1
Overview
3
4 Note
5
Part 4 – Troubleshooting
Remote
Controller
Display
U0
Gas shortage
U2
Abnormal power supply voltage
U3
Underfloor heating screed dry-out error
U4
Transmission error (between hydro-box and outdoor unit)
or UF
UF
Malfunction of transmission (between hydro-box and outdoor
unit) or gas shortage
U5
Transmission error (between hydro-box and user interface)
UA
Incorrect hydro-box connected to this system or unit type
connection not confirmed
(1)
Possibility of open phase power supply.
Contents of Malfunction
82
ESIE13-02A
Details of
Malfunction
(Reference
Page)
139
141
143
(1)
144
146
148
149