Panasonic U-72MF2U9 Service Manual page 182

3. 3WAY Alarm Codes
L10 Alarm
Alarm code
Alarm meaning
Alarm conditions
Probable cause
Check
Correction
1
Example
Notes
L11 Alarm
2
Alarm code
Alarm meaning
Alarm conditions
3
Probable cause
4
5
6
7
8
9
L10
Capacity setting of outdoor unit is not correct.
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.
Number of compressor JP7 in CTL board
1
2
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
Incorrect wiring of remote group control wiring (in case of shared solenoid valve kit)
(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
À
Solenoid Solenoid
valve kit valve kit
Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit
Remote Remote Remote Remote
controller controller controller controller
Á 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
item code: 81
open 210, 280
short 355, 420
Solenoid Solenoid
valve kit valve kit
Indoor unit Indoor unit Indoor unit Indoor unit
Remote Remote Remote
controller controller controller
Solenoid Solenoid
valve kit valve kit
Indoor unit Indoor unit
Except
Type E1
Type E1
Remote
Remote
controller controller
5 - 20
3WAY VRF SYSTEM
Trouble Diagnosis
Type of outdoor unit
72, 96
120, 144
Solenoid Solenoid
valve kit valve kit
Indoor unit Indoor unit Indoor unit Indoor unit Indoor unit
Remote Remote Remote Remote Remote
controller controller controller controller controller
Solenoid
valve kit
Indoor unit Indoor unit
Except
Type E1
Remote
Remote
controller controller
Indoor unit
Remote
controller
Except
Type E1
Continued