Rotex HPSU compact 508 Instruction Manual page 54

5 x Faults and malfunctions
Fault code Component/Designation
J1 Pressure sensor
J3 Thermistor discharge
J5 Temperature sensor suction pipe
J6 Aircoil temperature sensor
J7 Aircoil temperature sensor
J8 Temperature sensor liquid line
L4 Electrical components
L5 Electrical components
L8 Electrical components
L9 Electrical components
LC Electrical components
P1 PCB external heat pump device (RRLQ)
P4 Electrical components
PJ Incorrect capacity setting
U0 Refrigerant loss
U2 Main circuit without power
U4 Communication fault
U5 Communication fault
U7 Communication fault
UA Communication fault
Tab. 5-3 Error codes on the main control unit of HPSU compact
54
Malfunction message. Contact a ROTEX service technician.
Temperature sensor of the fluid line in the external heat pump device (RRLQ) is faulty. Contact a
ROTEX service technician.
Malfunction message. Contact a ROTEX service technician.
There is too little or no refrigerant left in the system. Check system for leaks, repair and refill.
Malfunction message. Contact a ROTEX service technician.
Respect the maximum tightening torque of 10 Nm for: T
Fault and possible causes
, T , T , T
V1 V2 V, BH1 V, BH2
BA ROTEX HPSU compact 2 - 04/2011
, T .
R2