Ferroli OMNIA M 3.2 22T Manual De Instalación Y Del Propietario página 149

OMNIA M 3.2
ERROR MALFUNCTION OR
CODE PROTECTION
DC compressor inverter
module fault
DC bus low voltage protection
(from inverter module mostly
when compressor running)
DC bus high voltage protection
from DC driver
MCE fault
Zero speed protection
Phase sequence fault
Compressor frequency
variation greater than 15Hz
within 1 second protection
Actual compressor frequency
differs from target frequency
by more than 15Hz protection
22T÷30T
1. Check the Heat pump system pressure;
2. Check the phase resistance of compressor;
3. Check the U, V, W power line connection sequence between the inventer
board and the compressor;
4. Check the L1, L2, L3 power line connection between the inventer board
and the Filter board;
5. Check the inventer board.
Cod. 3QE47660 - Rev. 00 - 02/2022
FAILURE CAUSE AND CORRECTIVE ACTION
149
EN