GRUPAd.o.o.
Reconnect
Reset address
no
yes
1.Communication failure
Is indoor unit address
properly set? Without
repetition?
no
no
no
yes
yes
Are communication terminals of
indoor and outdoor units
securely connected?
Is shielded wire
used for
communication?
Use shielded wire. Shield layer
should be grounded at single
point
Are communication wire
and power cable set
separately?
wiring Separately
yes
yes
yes
Is there external signal
interference?
Eliminate interference
Is indoor mainboard poorly
welded?
no
no
Replace indoor PCB
Check outdoor mainboard. Make
necessary replacement
Is number of indoor units
indicated by testing board
correct? Changeable?
yes
yes
Communication normal
Troubleshooting:
63
MB FRIGO Grupa d.o.o., Bani 81, 10010 Zagreb, tel: 01/66 08 002, fax: 01/66 08 005, [email protected], www.mbfrigo.hr