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00U07352260-A_EN
AHP60-50/70 -
Installation, Use and Maintenance
Error shown in the
display of the main
control board
Error description
Possible Causes
Solutions
E901 (Inverter card 1)
-
Compressor driver
and model mismatch
-
E902 (Inverter card 2)
Compressor driver and
model mismatch
Main control board or inverer
faulty
Change the card mismatching
with the model
E911 (Inverter card 1)
-
Surintensité
-
E912 (Inverter card 2)
Output current exceed
driver’s overload capability
- The compressor load is too
heavy
- Locked rotor or deteriorated
magnet
- Check the wiring between
driver and compressor
- If the wiring is ok, change
compressor
E921 (Inverter card 1)
-
PFC (Power Factor
Control) over current
-
E922 (Inverter card 2)
PFC converter over current
- Input sort circuit
- Faulty chocke
- Check the input phase-to-
phase short
- Check the L1 (if E921) or L2
(if E922) Chocke wire
- Check the value of chocke is
0.85mH±10%
- If the chocke is ok, change
driver
E931 (Inverter card 1)
-
Comunication error
with main controller
-
E932 (Inverter card 2)
The inverter doesn’t
answer to the main control
board for more than 30
seconds
- Connection is broken or
the master have stopped
communication
- Main control board or inverter
is faulty
- Communication wiring or
opto isolator is broken
- Check communication wiring
between driver and controller
- Change the main controller or
the inverter
- Change the wire or the opto
isolator