DOWNLOAD Panasonic U-4LE1E5 / U-4LE1E8 / U-5LE1E5 / U-5LE1E8 / U-6LE1E5 / U-6LE1E8 Service Manual ↓ Size: 7.25 MB | Pages: 127 in PDF or view online for FREE

3-5

E01

E02

E03

E04

E05

E06

Error in the Outdoor Unit Receiving Signal from the Indoor Unit

Error in Indoor Unit Transmitting Signal to the Outdoor Unit

Error in Indoor Unit Receiving Signal from the Outdoor unit

Error in Indoor Unit Receiving Signal from Remote Controller (central)

Remote Controller Transmission Error

Remote Controller Reception Error

E07

E08

E09

E12

E13

E15

Auto-Address Alarm (not enough units)

Error in Indoor Unit Transmitting Signal to Remote Controller

Start of Auto Address Setting Prohibited Due to Auto Address Setting Being in Progress

More Than One Remote Controller Set to Main Error

E16

E18

E20

E30

Outdoor Unit Serial Transmission Error

No Indoor Units Error

Faulty Communication in Group Control Wiring

Auto-Address Alarm (too many units)

F04

F07

Heat Exchanger Inlet Temperature Sensor (C1) Error

Compressor Discharge Temperature Sensor Error

F08

F12

F16

F31

Outdoor Unit Nonvolatile Memory (EEPROM) Error

High Pressure Sensor Error

Compressor Intake Temperature Sensor (TS) Error

Outdoor Air Temperature Sensor (TO) Error

H01

H02

H03

H31

HIC Error

Compressor CT Sensor (Current Sensor) Unplugged

L04

L10

Outdoor Unit Capacity Not Yet Setup Error

L18

4-way valve operation failure

Duplicated Setting of Outdoor System Address Error

PAM Error

Primary Current (Input) Detect of Overcurrent

Duplicate Indoor Unit Address Settings Error

Error in Outdoor Unit Transmitting Signal to the Indoor Unit

P03

P04

P05

P13

P14

P16

Overcurrent of Inverter Compressor

O

2

 Sensor

Forgot-to-open Valve Alarm

Power Supply Error

Actuation of High Pressure Switch

Compressor Discharge Temperature Error

P22

P29

INV Compressor Start-up Failed (including lock) Due to INV Compressor Wiring Open Phase, Faulty DCCT, etc.

Outdoor Fan Motor Error

SM830196-03_Mini_VRF SYS.indb   5

SM830196-03_Mini_VRF SYS.indb   5

2014/09/08   10:54:50

2014/09/08   10:54:50

3-6

If an outdoor unit displays an alarm, conduct this process after diagnosing the problem.

2

3

2-2

Connect the wiring

Has the wiring of the indoor/outdoor control line been completed?
Is it all connected?

Is the power of the indoor unit(s) and outdoor unit(s) on?

1-1

2-1

Run the auto address setting.

3-6

When units are networked, first set the system address for each outdoor unit in the order 
1-2-3 and then run auto address setting.

3-5

Has high voltage (over AC200V) been applied to the control line 
circuit? Has the fuse on the control PC board blown?
(Check each board of the indoor unit(s) and outdoor unit(s).)

2-2

Check the setting of the number of indoor units on the outdoor control 
PC board. Is the setting the same as the number of indoor units that 
are actually connected?

3-1

3-3

3-6

Is the indoor/outdoor control line connected to more than one 
outdoor unit? (Network wired?)

3-2

3-4

Correct the setting

Is the Terminal resistor select switch on the outdoor control PC board 
set to just one unit?

3-3

3-5

2-1

Power on

 

 

2-3

3-1

 

3-2

Correct the setting

 

 

 

Yes

Yes

Yes

Yes

Yes

Yes

Yes

 

No

No

No

No

No

No

No 3-6

Are other outdoor units using a duplicate setting?

3-4

The power line and indoor/outdoor control line are miswired. Turn off the power, check & 
correct the miswiring and then make connections of the indoor/outdoor control lines to the 
emergency side of all the control PC boards and controllers.

2-3

Installation
or setting
related

 

Indoor/
outdoor
control line

1 Auto

Address

SM830196-03_Mini_VRF SYS.indb   6

SM830196-03_Mini_VRF SYS.indb   6

2014/09/08   10:54:50

2014/09/08   10:54:50

3-7

(When indoor unit(s) are connected)

It is judged an error if no self-addressed communication is sent to the remote controller in a 3-minute period.

When a remote controller is set to sub remote controller.
When there are nine or more indoor units in a remote control group’s wiring.

The nonvolatile memory (EEPROM) is not installed or faulty when turning on the power.

Remote controller check mode
Malfunctions of the remote controller itself (reception circuit error)

•
•

•

•
•

The ‘/’ in the table indicates the DC motor’s indoor unit board/AC motor’s indoor unit board.

•

There is no TEST pin on the AC motor’s indoor unit board.

•

Regarding the remote controller check, refer to the Reference Materials.

•

For information on the procedures for replacing the nonvolatile memory (EEPROM) of the indoor unit and/or replacing the
indoor unit’s control board, refer to the manual that is packaged with the indoor unit service board.

•

When the CHK (check pin) and/or TEST (test pin) on the indoor unit control PC board are short circuited.

•

Indoor unit control PC board error

•

2

3

2-2

3-1

Is that indoor unit under group control?

Is auto address setting complete?

1-1

Is there an auto address setting error (Is the outdoor unit showing 
an alarm)?

1-2

Conduct checks prior to auto address setting.

1-3

2-1

The nonvolatile memory (EEPROM) on the indoor unit’s control PC board is either not 
installed, improperly installed or the nonvolatile memory is faulty. Correct this or after 
replacing the nonvolatile memory, write model data to it in the remote control detailed 
settings mode.

3-6

Is there a short, miswiring, disconnection, wrong contact or 
grounding in the remote control’s wiring? 

3-7

Is the LED blinking on the indoor unit’s control PC board?

3-5

Are there any indoor units with their power off in the remote
control group’s wiring?

2-2

Are the CHK pin and/or TEST pin on the indoor unit control board 
short-circuited?

3-1

3-3

3-5

Is the wireless remote controller and/or optional control PC board 
connected to on the indoor unit’s control PC board?

3-2

3-4

3-5

Disconnect the connector mentioned above on the PC board of the 
indoor unit control PC board, and see whether the E01 goes off after 
several minutes. (When doing so, if two remote controllers are 
being used and the wireless remote controller is the main remote 
controller, set the other remote controller as the main.)

3-3

3-7

3-6

1-2

1-3

1-3

2-1

 

 

Power on

2-3

 

Remove the short

3-2

 

 

 

Yes

Yes

Yes

Yes

Yes

Yes

 

No

No

No

Correct the wiring

2-4

Are nine or more indoor units connected in one remote control 
group’s wiring?

2-3

Was the remote control group’s wiring changed after auto address 
setting was complete? Alternatively, were group settings changed 
in the remote control detailed settings mode?

2-4

 

2-5

3-1

 

Yes

Yes

No

No

No

No

No

Yes

No

Replace all optional control PC board and/or wireless remote control parts including wiring.

3-4

No main unit in the remote control group's wiring? Re-execute auto address setting.

2-5

Installation
or setting
related

 

Group
Control
Wiring

1 Auto

Address

Yes

No

Replace the indoor 
unit’s control board.

Correct the wiring

 Yes

No

SM830196-03_Mini_VRF SYS.indb   7

SM830196-03_Mini_VRF SYS.indb   7

2014/09/08   10:54:50

2014/09/08   10:54:50

3-8

LED

OPTION

CHK Pin

DC Motor Model Indoor Unit Control Board

TEST Pin

LED

CHK Pin

AC Motor Model Indoor Unit Control Board

OPTION

Regarding the PCB photos for individual indoor units, refer to the Section “PCB AND FUNCTIONS” in the 
TECHNICAL DATA.

SM830196-03_Mini_VRF SYS.indb   8

SM830196-03_Mini_VRF SYS.indb   8

2014/09/08   10:54:50

2014/09/08   10:54:50