Rotex HPSU compact 304 Installation And Maintenance Manual

8 x Errors, malfunctions and messages
FA ROTEX HPSU compact 4 - 06/2015
49
8.3 Fault codes
Device-internal circula-
tion pump is excessively
noisy while running
Air in the water circuit
Ɣ Fully
vent the heating system and device-internal
circulation pump.
Noises caused by vibrations.
Ɣ Check the HPSU compact, its components and covers
to ensure they are fastened correctly.
Bearing damage in the device-internal circula-
tion pump.
Ɣ R
educe pump speed [Min Leistung Pumpe] and [Max
Leistung Pumpe]).
Ɣ Replace device-internal circulation pump.
Water pressure at pump inlet too low.
Ɣ On the controll
er (rotary switch setting "Info" )
check whether there is adequate water pressure
(>0.5 bar).
Ɣ C
heck that the pressure gauge is working correctly
(connect an external pressure gauge).
Ɣ Check the primary pressure in the expansion
container and the water pressure, if necessary, refill
the heating water and reset the primary pressure (see
chapter 7.5).
Safety pressure relief
valve is leaking or always
open.
Expansion tank is defective.
Ɣ R
eplace expansion tank.
Water pressure in the heating system is too
high.
Ɣ On the control unit (rotary switch position "Info" )
check that the water pressure lies beneath the stated
maximum pressure. If necessary, bleed the water until
the pressure lies in central permissible range.
Safety pressure relief valve is stuck.
Ɣ C
heck safety pressure relief valve and if necessary,
replace it.
– Turn the red knob on the safety pressure relief
valve coun
terclockwise. If you can hear a rattling
noise, the safety pressure relief valve needs
replacing.
Tab. 8-1 Possible malfunctions of the HPSU compact
Bei allen Störungen In the case of all malfunctions / error messages due to possibly defective sensors, all associated con-
nection cables, connection points (plug contacts correctly in place) and printed circuit boards must be checked before re-
placing the sensor.
Component allocation: see fig. 3-1 to fig. 3-5 and fig. 8-4
Code Malfunction /
Error messageg
Component/Designation Causes and possible error correction
Display Internal
E9001 80
Fehler Rück-
lauffühler
Return flow temperature
se
nsor t
R2
Sensor or connection cable defective.
Ɣ Check, replace.
E9002 81
Fehler Vorlauffüh-
ler
Flow temperature sensor
t
V2
or t
V, BH
Sensor or connection cable defective.
Ɣ Check, replace.
E9003 89
Frost protection
function
error
Plate heat exchanger
(PHE)
Measured value t
V2
<0 °C
– Failure of the frost protection function for the plate heat
exchanger because the water flow is too low. See error code
E9004 / 7H.
– Failure of the frost protection fun
ction of the plate heat
exchanger because there is a lack of coolant in the system.
See error code E9015 / E4.
Malfunction Possible cause Possible solution

Rotex HPSU compact 304 Specifications

General

Brand	Rotex
Model	HPSU compact 304
Category	Controller
Language	English