
ESIE02–01
Error Codes: System Malfunctions
Part 3 – Troubleshooting
3–55
3
3
4
5
1
4.3
Reverse Phase (
U1
)
Error code
U1
This error code is only for 3-phase equipment.
LED indication
The table below shows the LED indication.
Error generation
The error is generated when the difference between phase L1 and L3 is not 240˚. The illustration below
shows the 3-phase network.
Causes
The possible causes are:
■
Malfunctioning power supply wiring connection
■
Broken or disconnected power supply wiring
■
Malfunctioning outdoor unit PCB
Operation
HAP (green)
H1P (red)
H2P (red)
Normal
6
8
8
Malfunctioning
6
8
7
120
90
180
L1
L2
L3
240
240˚
270
360
L1
L3
L2
240˚
120˚
Summary of Contents for Sky Air R-407C
Page 1: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Page 2: ......
Page 3: ...ESIE02 01 Service Manual Sky Air R 407C B series SV p p p...
Page 4: ......
Page 16: ...Introduction ESIE02 01 xii 3 1 4 5...
Page 18: ...ESIE02 01 1 2 Part 1 System Outline 3 1 1 5...
Page 42: ...General Outline Outdoor Units ESIE02 01 1 26 Part 1 System Outline 3 1 1 4 5...
Page 49: ...ESIE02 01 General Outline Indoor Units Part 1 System Outline 1 33 3 1 4 5...
Page 72: ...General Outline Indoor Units ESIE02 01 1 56 Part 1 System Outline 3 1 1 4 5...
Page 86: ...Specifications ESIE02 01 1 70 Part 1 System Outline 3 1 1 4 5...
Page 110: ...ESIE02 01 1 94 Part 1 System Outline...
Page 130: ...Switch Box Layout ESIE02 01 1 114 Part 1 System Outline 3 1 1 4 5...
Page 180: ...PCB Layout ESIE02 01 1 164 Part 1 System Outline 3 1 1 4 5...
Page 182: ...ESIE02 01 2 2 Part 2 Functional Description 3 1 2 5...
Page 204: ...General Functionality ESIE02 01 2 24 Part 2 Functional Description 3 1 2 4 5...
Page 216: ...Overview of the cooling mode functions ESIE02 01 2 36 Part 2 Functional Description 3 1 2 4 5...
Page 232: ...ESIE02 01 3 2 Part 3 Troubleshooting 3 1 3 5...
Page 294: ...Error Codes System Malfunctions ESIE02 01 3 64 Part 3 Troubleshooting 3 1 3 4 5...