Rotenso J100Wi, Service Manual

Page: 101 / 132

LCAC R32 Series
101 Service manual
4.3 UNITS WITH TWINS FUNCTION (FOR THE SUPER-SLIM CASSETTE & DUCT)
4.3.1 Communication Malfunction between Master Unit and Indoor Uni
F3 Displayed
Communication failure between
master unit and slave unit
Check the dial switch settings of
master unit and slave unit. Are they
correct?
Correct the
settings
No
Check the PQE communication wires
connection, is it wired properly?
Yes
Correct the wire
connections
No
One of the 2 indoor PCBs is defective.
Connect only one indoor unit to the outdoor
unit separately. The one that displays an E1
error code is defective
Yes
E8
4.3.2 Other Malfunction between Master Unit and Indoor Unit
One indoor unit displays ”E9”, which means the other indoor unit is faulty. Check the other indoor unit’s error code
and then follow the prescribed solutions to resolve the malfunction.
4.4 OUTDOOR UNITS
4.4.1 Compressor Driven Chip EEPROM Malfunction
Malfunction conditions
Main PCB chip does not receive feedback from EEPROM chip
Possible causes
• Installation mistakes
• Faulty PCB
Yes
Replace the outdoor main
PCB
Power off, then restart the
unit 2 minutes later .Does the
malfunction still remain?
Compress or driven chip
EEPROM malfunction
PART 6. TROUBLESHOOTING