ESIE06-03
Error Codes: System Malfunctions
3–45
3
3
4
5
1
4.4
“U4”
Signal Transmission Error (between Hydro-box and Outdoor Units)
Error code
U4
Method of
malfunction
detection
The data received from the outdoor unit in hydro-box-outdoor unit signal transmission is checked
whether it is normal.
Malfunction
decision conditions
When the data sent from the outdoor unit cannot be received normally, or when the content of the data
is abnormal.
Supposed causes
P
Faulty outdoor unit PCB.
P
Faulty hydro-box PCB.
P
Hydro-box-outdoor unit signal transmission error due to wiring error.
P
Hydro-box-outdoor unit signal transmission error due to disturbed power supply waveform.
P
Hydro-box
-outdoor unit signal transmission error due to breaking of wire in the connection
wires between the
Hydro-box
and outdoor units.
Содержание Altherma EKHBH Series
Страница 2: ...ESIE06 03 1 2 Part 1 System Outline 3 1 1 5 ...
Страница 26: ...Functional Diagrams ESIE06 03 1 26 Part 1 System Outline 3 1 1 4 5 ...
Страница 32: ...Piping Diagrams ESIE06 03 1 32 Part 1 System Outline 3 1 1 4 5 ...
Страница 38: ...Switch Box Layout ESIE06 03 1 38 Part 1 System Outline 3 1 1 4 5 ...
Страница 58: ...PCB Layout ESIE06 03 1 58 Part 1 System Outline 3 1 1 4 5 ...
Страница 60: ...ESIE06 03 2 2 Part 2 Functional Description 3 1 2 5 ...
Страница 68: ...Hydro box Functional Concept ESIE06 03 2 10 Part 2 Functional Description 3 1 2 4 5 ...
Страница 88: ...ESIE06 03 3 2 Part 3 Troubleshooting 3 1 3 5 ...
Страница 134: ...Error Codes System Malfunctions ESIE06 03 3 48 Part 3 Troubleshooting 3 1 3 4 5 ...
Страница 152: ...Additional Checks for Troubleshooting ESIE06 03 3 66 Part 3 Troubleshooting 3 1 3 4 5 ...
Страница 154: ...ESIE06 03 5 2 Part 5 Disassembly and Maintenance 3 1 5 ...
Страница 180: ...Removal procedure outdoor unit ERYQ005 007AAV3 ESIE06 03 5 28 Part 5 Disassembly and Maintenance 3 1 5 5 ...