Rotex HPSU compact (V5) - Page 62

8 x Errors, malfunctions and messages
FA ROTEX HPSU compact (V5) • 
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E9022 H9 Fault AT sensor
External temperature sen-
sor R1T in the heat pump
exterior unit
Sensor or connection cable defective.
Ɣ Check, replace.
E9023 HC Fault DHW sensor
Storage tank temperature
sensor t
DHW2
E9024 J1 Pressure sensor
Pressure sensor S1NPH
in the heat pump exterior
unit
E9025 J3 Fault T-return
Discharge temperature
sensor R2T in the heat
pump exterior unit
E9026 J5
Suction pipe sen-
sor
Suction temperature sen-
sor R3T in the heat pump
exterio
r unit
E9027 J6
Aircoil sensor
Defrost
Temperature sensor of the
lamella heat exchanger
R5T in the heat pump
exterior unit
E9028 J7 Aircoil sensor temp
Temperature sensor of the
la
mella heat exchanger
R4T in the heat pump
exterior unit
(only in 11-16 kW
system
s)
E9029 J8
Fault cold sensor
OU
Temperature sensor liq-
uid-side R6T in the heat
pump exterior unit
Code Malfunction /
Error message
Component/Designation Causes and possible error correction
Display Internal