Panasonic U-8MF2E8 Service Manual page 142

4. 3WAY Alarm Codes
L10 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
Example
Notes
L11 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
5
Check
Correction
Example
Notes
L10
Outdoor unit capacity not set
The outdoor unit capacity has not been set, or the setting is not allowed by the system.
This alarm occurs because the capacity has not been set.
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.
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.
—
The outdoor unit maintenance remote controller is required in order to set the capacity in the outdoor
unit EEPROM.
L11
Installation or connection failure in a common use solenoid valve kit, miswiring of indoor unit's remote
control group
(1) The connection system with the multiple indoor units at only one solenoid valve kit and installation
failure of "common use solenoid valve kit"
* "L11" alarm occurs in the same series of all remote controllers.
(2) The connection system with the multiple indoor units at only one solenoid valve kit and wire
connection that is not allowed
* "L11" alarm occurs at the only target indoor unit.
(3) Remote control group wiring with a different refrigerant circuit's indoor unit
* "L11" alarm occurs at the only target indoor unit.
(1) 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.
(2) Wiring shown below that are not allowed
"Remote control group wiring with a different solenoid valve kit connected to the indoor unit
Solenoid Solenoid
valve kit valve kit
Indoor unit Indoor unit Indoor unit Indoor unit
Remote Remote Remote
controller controller controller
Remote control group wiring more than one (1) indoor unit with type E1 within only one
solenoid valve kit
Solenoid
valve kit
Indoor unit Indoor unit
Except
Type E1
Type E1
Remote
Remote
controller
controller
Remote control group wiring with a different refrigerant circuit in the indoor unit
(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.)
* In this case, "L11" alarm occurs at all indoor units' remote controllers.
(2) Check the condition of remote control group wiring where "L11" alarm occurs.
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.
(3) Check the model of indoor unit connected to a remote control group 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.
(1) 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.
—
This alarm may occasionally occur when connecting the common use solenoid valve kit.
Solenoid Solenoid
valve kit valve kit
Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit
Remote Remote Remote Remote
controller controller controller controller
Solenoid Solenoid
valve kit valve kit
Indoor unit Indoor unit
Type E1
Remote
Remote
controller
controller
5 - 20
3WAY SYSTEM
Trouble Diagnosis
Solenoid
valve kit
Indoor unit Indoor unit Indoor unit Indoor unit
Remote Remote Remote Remote
controller controller controller controller controller
Solenoid
valve kit
Indoor unit Indoor unit
Except
Except
Type E1
Type E1
Remote
controller
controller
Solenoid
valve kit
Indoor unit Indoor unit
Remote Remote
controller
Except
Type E1
Remote