104
F.91 Communication error, DIO
F.91
System characteristics
■
Heat pump in control mode
■
DIO electronics module in emergency mode
Cause
DIO electronics module communication error
Measures
1. Check the settings in the commissioning assistant.
Adjust if necessary.
2. Check the following connections for the PlusBus:
■
On the DIO electronics module
■
Wall mounted indoor unit:
Connection on the underside of the appliance, 5-
pole connection socket on the right, termi-
nals 74.1/74.2
Floorstanding indoor unit:
Connection to luster terminals for BUS connec-
tions, terminals 74.1/74.2
■
On the HPMU electronics module, plug 74
■
Check wires and plugs for correct seating.
■
Check connections for contact corrosion.
■
Check cables for mechanical damage, e.g. crush-
ing, kinking, chafing or breakage.
3. Check power supply to HHPMU electronics module,
terminals X4.1/X4.2: 24 V to 28 V
4. Replace DIO electronics module.
F.92 Communication error, ADIO
F.92
System characteristics
■
Heat pump in control mode
■
ADIO electronics module in emergency mode
Cause
ADIO electronics module communication error
Measures
1. Check the settings in the commissioning assistant.
Adjust if necessary.
2. Check the following connections for the PlusBus:
■
On the ADIO electronics module
■
Wall mounted indoor unit:
Connection on the underside of the appliance, 5-
pole connection socket on the right, termi-
nals 74.1/74.2
Floorstanding indoor unit:
Connection to luster terminals for BUS connec-
tions, terminals 74.1/74.2
■
On the HPMU electronics module, plug 74
■
Check wires and plugs for correct seating.
■
Check connections for contact corrosion.
■
Check cables for mechanical damage, e.g. crush-
ing, kinking, chafing or breakage.
3. Check power supply to HHPMU electronics module,
terminals X4.1/X4.2: 24 V to 28 V
4. Replace ADIO electronics module.
Messages
Fault messages (cont.)
6218234
Diagnosis
To Next Page