22
English
13. WIRING DIAGRAM
(Refer to Fig. 33)
L8
Electric thermal (outdoor unit)
Possible electrical overload in the compressor or cut line in the compressor motor.
L9
Stall prevention (outdoor unit)
Compressor possibly locked.
LC
Transmission malfunction between the outdoor control unit
'
s inverters (outdoor unit)
P1
Open-phase or main circuit low voltage (outdoor unit)
P3
PC-board temperature sensor malfunction (outdoor unit)
P4
Heat-radiating fin temperature sensor malfunction (outdoor unit)
PJ
Type set improper (outdoor unit)
Capacity data is wrongly proset. Or there is nothing programmed in the data hold IC.
U0
Suction pipe temperature abnormal or refrigerant shortage.
U1
Reverse phase
Peverse two phase of the L1, L2 and L3 leads.
U2
Power source voltage malfunction (NOTE 3)
Includes the defect in 52C.
U4
UF
Transmission error (indoor unit - outdoor unit)
Incorrect wiring between indoor and outdoor units or malfunction of the PC board
mounted on the indoor and the outdoor units.
If UF is shown, the wiring between the indoor and outdoor unit is not properly wired.
Therefore, immediately disconnect the power supply and correct the wiring. (The com-
pressor and the fan mounted on the outdoor unit may start operation independent of the
remote controller operation)
U5
Transmission error (indoor unit - outdoor unit)
Transmission is improper between the indoor unit and the remote controller.
U8
Malfunction in transmission between main and sub remote controls.
(Malfunction in sub remote control.)
UA
Miss setting for multi system
Setting is wrong for selector switch of multi-system. (see switch SS2 on the main unit
'
s
PC board) Incorrect combination with indoor unit and outdoor unit.
UC
Central control address overlapping
1
TO OUTDOOR UNIT
2
NOTE) 3
3
WIRED REMOTE CONTROLLER
4
CONTROL BOX
5
RECEIVER/DISPLAY UNIT
6
IN CASE OF SIMULTANEOUS OPERA-
TION SYSTEM
7
INDOOR UNIT (MASTER)
8
INDOOR UNIT (SLAVE)
9
REMOTE CONTROLLER
10
NOTE) 5
11
CENTRAL REMOTE CONTROLLER
12
NOTE) 1