01.07.2022
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AHP60-50/70 -
Installation, Use and Maintenance
Code
Description
Cause
Solution
E801
(*)
continued
Inverter board
1 communication
error
• The communication
cable between the
inverter board and
the opto-coupler is
not connected or is
defective.
• The opto-coupler
OPT1 is defective or
not powered.
If the functional diagram connections are all present,
Check:
• Check if opto-coupler OPT1 is powered, if there is a
12V voltage between the VCC and GND terminals.
• Bypass the opto-coupler separating the
compressor board and the fan board to
determine if the opto-coupler is working. :
• If the LEDs of the compressor inverter
board INV1 are not flashing and the board is
powered, the INV1 board needs to be replaced:
E802
Inverter board
2 communication
error
• The communication
cable between the
inverter board and
the fan opto-coupler
is not connected or is
defective.
• The opto-coupler
OPT1 is defective or
not powered.
• Check the communication cable between the
control terminals CN15 2-3, opto-coupler OPT1 and
compressor board INV2:
• Check the 12VDC AL1 power supply board
Inverter board
for compressor 1
Coupler
isolator
switch
V415
control
unit
Inverter board for
compressor 2
Transformateur
module GI/
uniquement
présent avec
module GI