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OMNIA SW-T 3.2
Unit
Malfunction or protection
Error code
in error
fault (Tbt2)
Ec
IU
Plate exchanger input water temperature probe
fault (Tw_in)
Ed
IU
EE
IU
F1
DC current too low
UE
Communication error between indoor and out-
door unit
H0
UI / UE
Communications error between board A of the
inverter module and board B of the main control
H1
EU
board of the outdoor unit
Refrigerant liquid temperature probe fault (T2) 1.Check the probe resistance.
H2
IU
Refrigerant gas temperature probe fault (T2B) 1.Check the probe resistance.
H3
IU
H4
Three times P6 fan protection
EU
Temperature probe fault. Room (Ta)
H5
IU
Fan protection
H6
EU
Voltage protection outside limits
H7
EU
Pressure sensor fault
H8
EU
Water outlet temperature probe fault for zone
2 (Tw2)
H9
IU
Plate heat exchanger water outlet temperature
probe fault (Tw_out)
HA
IU
Appears after 3 interventions of the "PP" error
Hb
IU
with Tw_out <7°C
Cause of fault and corrective action
1.Check the probe resistance.
2.The probe connector is disconnected. Reconnect it.
tape.
1.Check the probe resistance.
2.The probe connector is disconnected. Reconnect it.
tape.
-
Reconnect them.
ers, etc., add a barrier to protect the unit or move the unit elsewhere.
1. Check that the boards are powered. Check that the PCB indicator light on the inverter module is on
2. If the indicator light is off, check the cable connection between the inverter module board and the
main control board; if the cable is loose or broken, reconnect the cable or replace it with a new one.
2.The probe connector is disconnected. Reconnect it.
tape.
2.The probe connector is disconnected. Reconnect it.
tape.
refer to P6
1.Check the probe resistance.
2.The probe connector is disconnected. Reconnect it.
tape.
1. Strong wind against the expulsion flow of the fan can cause the fan to rotate in the reverse direc-
tion. Change the position of the unit or create a shelter to avoid this phenomenon.
2. Fan motor broken, replace it with a new motor
2. Switch off and on again multiple times in rapid succession. Leave the unit switched off for more
than 3 minutes, then switch it on again.
1. The pressure sensor connection is loose; reconnect it.
2. Pressure sensor fault. Replace it with a new one.
1.Check the probe resistance.
2.The probe connector is disconnected. Reconnect it.
tape.
1.Check the probe resistance.
2.The probe connector is disconnected. Reconnect it.
tape.
Refer to "PP" error.
Cod. 354M000010 - Rev. 03 - 06/2023
-
EN
125
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