GRUPAd.o.o.
11. Failure code 28 and 29: Check if the voltage input is in the range of 380V
±
15%. Then check if the wiring connection is proper, such as if the terminal of power
module is inserted firmly, PTC control wire is normal.
Replace power module
no
Re-electrified, check if the
failure disappears
10.Failure code from 24 to 27, from 30 to 40
Check if the sequence of A and B is correct
yes
9. Communication with power module failure
Check if PCB is electrified with
the power module
no
Check if the wiring between them is normal
Check the suction
temperature
Check the system: if the stop valve is normal;
if EEV works normally; if the system is lack of
refrigerant; if the system is clogged or leaks
yes
Measure if the actual air return
temperature is over 40degree
no
8. Suction temperature protection
68
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
