4 x Faults and malfunctions
FA ROTEX RoCon HP - 03/2013
33
Tab. 4-2 Error codes on the main control unit of HPSU compact
9040 U3 Screed function Screed function active No fault.
9041 U4
Transmission error
Communication fault
Malfunction message. Contact ROTEX heating technician.
9042 U5 Communication fault
9043 U7 Communication fault
9044 UA Communication fault
E75 — —
Outside temperature sen-
sor
Outside temperature sensor defective.
E76 — —
Domestic hot water tem-
perature sensor
Domestic hot water temperature sensor defective.
E81 — — Circuit board RoCon BM1 Parameter store in EEPROM faulty.
E88 — — Circuit board RoCon BM1 Parameter store in external flash memory faulty.
E91 — — Connected CAN modules Bus detection of a CAN module doubly present.
E128 — — Temperature sensor Temperature sensor in flow sensor defective.
E129 — — Pressure sensor Pressure sensor defective.
E8005 — —
Water pressure heating
network too low
Water pressure has fallen below the permissible minimum value.
W8006 — — Heating network Maximum permissible pressure drop exceeded.
W8007 — —
Water pressure heating
network too high
Water pressure has exceeded the permissible maximum value.
Code Error message Component/Designation Fault and possible causes
Display Internal
Respect the maximum tightening torque of 10 Nm for:
T
V1
, T
V2
, T
V, BH1
, T
V, BH2
, T
R2
.
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