122
5.4.2 A3 CONTROL & POWER BOARD REPLACEMENT
WARNING: Certain boards are fit with power capacitors which can keep electrical and can be dangerous even
after switch off.
IMPORTANT: Some setting data (parameters) specific to each type of heat pump are stored in the EEPROM on the A3
board.
When replacing a PCB, it is necessary to remove the EEPROM from the malfunctioning board and re-install it on the
new board.
FOR UNITS 095 & 125:
Procedure:
1) Before replacing the board (A3), make sure that the unit is switched off.
2) Remove top and front panel of the unit.
3) A3 board is installed in a plastic cabinet. Remove the four latches to take out the plastic cover.
4) Disconnect the red plug and remove the insulation sheet.
5) Disconnect completely all wires and connectors from the board.
6) Unscrew fixing screws of the PCB in the cabinet
Unit 095 Unit 125
Unit 095 Unit 125
« Power »
red LED
« Power »
red LED
EEPROM
EEPROM
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