Rotex HPSU compact 308 - Page 48

48
BA ROTEX HPSU compact 4 - 09/2013
8 x Faults and malfunctions
Tab. 8-2 Error codes on the main control unit of HPSU compact
9030 L4
Electrical fault
Electrical components
Malfunction message. Contact ROTEX heating technician.
9031 L5 Electrical components
9032 L8 Electrical components
9033 L9 Electrical components
9034 LC Electrical components
9035 P1 Board defective
PCB in the external heat
pump device
9036 P4 Electrical fault Electrical components
9037 PJ Output setting Incorrect capacity setting
9038 U0 Refrigerant leak Refrigerant loss
There is too little or no refrigerant left in the system. Check system
for leaks, repair and refill.
9039 U2
Under/ over 
voltage
Main circuit without power Malfunction message. Contact ROTEX heating technician.
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.
E200 — — Communication fault
The Modbus communication between the operating section BM1
and main board A1P is disrupted. Check cabling, check RTXAL4
board.
E8005 — —
Water pressure heating
network too low
Water pressure has fallen below the minimum permissible value.
E9000 — —
Temporary internal mes-
sage
If this message is shown for a longer period of time, contact the
ROTEX Service Team.
W8006 — — Heating network Maximum permissible pressure drop exceeded.
W8007 — —
Water pressure heating
network too high
Water pressure has exceeded the maximum permissible value.
Code Error message Component/Designation Fault and possible causes
Display Internal