Panasonic U-10MF1E8 Service Manual Download Page 138

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3-WAY SYSTEM

Trouble Diagnosis

4. 3-WAY Alarm Codes

L10 Alarm

Alarm code

L10

Alarm meaning

Outdoor unit capacity not set

Alarm conditions

The outdoor unit capacity has not been set, or the setting is not allowed by the system.

Probable cause

This alarm occurs because the capacity has not been set.

Check

Connect the outdoor unit maintenance remote controller. On the outdoor unit EEPROM detailed
setting mode screen, check the value for the outdoor unit capacity (item code 81). Check that it is
not set to “0” or to a capacity that is not allowed.

Correction

If item code 81 is incorrect, use the outdoor unit maintenance remote controller and set it correctly.
* After changing the setting, be sure to reset both the indoor and outdoor power.

Example

—

Notes

The outdoor unit maintenance remote controller is required in order to set the capacity in the outdoor
unit EEPROM.

L11 Alarm

Alarm code

L11

Alarm meaning

Installation or connection failure in a common use solenoid valve kit, miswiring of indoor unit's remote
control group

Alarm conditions

The connection system with the multiple indoor units at only one solenoid valve kit and installation
failure of "common use solenoid valve kit"

Probable cause

Installation failure of "common use solenoid valve kit" (setting from PC at test run operation)
and address setting is not made in the same series of all indoor units.

Wiring shown below that are not allowed

(1)

"Remote control group wiring with a different solenoid valve kit connected to the indoor unit

(2)

"L11" alarm occurs in the same series of all remote controllers.

* "L11" alarm occurs at the only target indoor unit.

The connection system with the multiple indoor units at only one solenoid valve kit and wire
connection that is not allowed

(2)

* "L11" alarm occurs at the only target indoor unit.

Remote control group wiring with a different refrigerant circuit's indoor unit

(3)

Remote control group wiring more than one (1) indoor unit with type E1 within only one
solenoid valve kit

Remote control group wiring with a different refrigerant circuit in the indoor unit

* In this case, "L11" alarm occurs at all indoor units' remote controllers.

Check

(1)

When setting "installation of common use solenoid valve kit" is made by PC, check whether the
installation change was made in the same series of all indoor units or not.
(Check the software of address setting of PC.)

Check whether the group wiring is made with the indoor unit of a different solenoid valve kit or not.
Check whether the group wiring is made with the indoor unit of a different refrigerant circuit or not.

(2) Check the condition of remote control group wiring where "L11" alarm occurs.

Check whether type E1 indoor units are connected in the group wiring or not.

* Check the model of indoor unit with the item code 10 for the detailed setting of the remote control.

(3) Check the model of indoor unit connected to a remote control group where "L11" alarm occurs.

Correction

Perform "installation of common use solenoid valve kit" from PC in the same series of all indoor units.

(2) With a common use solenoid valve kit, change into the wiring that is allowed.

Example

—

Notes

This alarm may occasionally occur when connecting the common use solenoid valve kit.

Indoor unit