Rotex HPSU compact (V5) Installation And Maintenance Manual

8 x Errors, malfunctions and messages
FA ROTEX HPSU compact (V5) • 
65
E9038 U0 Coolant leak
Sensors and parameter
settings in the he
at pump
exterior unit
Loss of coolant.
– Coolant quantity too low. See error code E9015 / E4.
– Block or leak in the coolant line.
Ɣ Check,
correct cause, refill coolant.
E9039 U2 Under/over voltage
Mains voltage outside the permitted range
– Sporadic errors shortly after a power outage.
Ɣ No error correction required.
– Inverter board in the heat pump exterior unit defective.
Ɣ Check, replace.
Ɣ If
necessary contact ROTEX service technician.
E9041 U4
Transmission fault Electrical components
Communication between the heat pump exterior equipment and
hea
t pump interior equipment malfunctioning.
– Cabling or connections, poor contact.
– No heat pump exterior unit connected.
– Circuit board A1P defective.
– Main board in the heat pump exterior unit defective.
Ɣ Ch
eck, replace.
E9042 U5
Communication between switch board A1P and RoCon BM1 dis-
rupted.
Ɣ See error code E200.
E9043 U7
Communication between main board and inverter board dis-
rupted.
– Main board in the heat pump exterior unit defective.
– Inverter board in the heat pump exterior unit defective.
– Cabling, poor contact.
Ɣ Check,
correct cause, replace.
E9044 UA
Configuration of switchboard A1P not
suitable for the heat pump
exterior unit
Ɣ Replace circuit board A1P.
Ɣ If
necessary contact ROTEX service technician.
E75 —
Error in external
te
mperature sen-
sor
External temperature sen-
sor t
AU
(RoCon OT1)
Optional external temperature sensor RoCon
OT1 defective or not
connected.
Ɣ Check, replace.
Ɣ If there is no external temperature sensor connected, check
the parameter [Outside Config] configuration.
E76 —
Error storage tank
te
mperature sen-
sor
Storage tank temperature
se
nsor t
DHW1
Storage temperature sensor t
DHW1
or connection cable defective
or not connected.
Ɣ Check, replace.
Ɣ Ch
eck configuration [Storage Config].
E81 —
Communication
faul
t
Circuit board RoCon BM1
Parameter store in EEPROM faulty.
Ɣ Contact a ROTEX service technician.
E88 — Circuit board RoCon BM1
Parameter store in external flash memory fa
ulty.
Ɣ Contact a ROTEX service technician.
E91 — Connected CAN modules Bus ID of a CAN module duplicated, set unique data bus address.
E128 —
Error return flow
te
mperature sen-
sor
Return flow temperature
se
nsor t
R1
Return flow temperature sensor t
R1
in the flow sensor FLS or con-
nection cable defective.
Ɣ Check, replace.
E129 —
Pressure sensor
error
Pressure sensor DS
Pressure sensor DS defective.
Ɣ Check, replace.
Code Malfunction /
Error message
Component/Designation Causes and possible error correction
Display Internal

Rotex HPSU compact (V5) Specifications

General

Brand	Rotex
Model	HPSU compact (V5)
Category	Heat Pump
Language	English