Rotex HPSU compact 308 User Manual

46
BA ROTEX HPSU compact 4 - 09/2013
8 x Faults and malfunctions
8.3 Fault codes
Circulation pump is
being excessively noisy
while running
Air in the water circuit ● Bl
eed the entire water circuit.
Noises caused by vibrations.
● Check the HPSU compact, its components and
covers to ensure they are fastened correctly.
Bearings damage in the circulation pump.
● Have the system checked by a ROTEX heating
technician.
Water pressure at pump inlet too low.
● U
sing the controller (rotary switch position ) check
whether sufficient water pressure (> 0.5 bar) is
available.
● C
heck that the pressure gauge is working correctly
(connect an external pressure gauge).
● Have the system checked by a ROTEX heating
technician.
Safety pressure relief
va
lve is leaking or
always open.
Expansion tank is defective.
● Have the expansion tank checked by a ROTEX
specialist heating technician.
Water quantity or water
pressure in the system
is too high.
● On the controll
er (rotary switch setting "Info" )
check whether there is adequate water pressure
(> 0.5 bar) (must be below the stated maximum
p
ressure) and where necessary drain water off until it
lies mid-range.
Safety pressure relief valve is stuck.
● Have the system checked by a ROTEX heating
technician.
Tab. 8-1 Possible malfunctions of the HPSU compact
Malfunction Possible cause Possible solution
Code Error message Component/Designation Fault and possible causes
Display Internal
9001 80 Fault return sensor
Temperature sensor dis-
charge water temperature
Return line temperature sensor t
R2
defective.
9002 81 Fault flow sensor
Temperature sensor feed
wa
ter temperature
Flow temperature sensor t
V2
defective.
9003 89
Fault frost protec-
tion function.
Failure of the frost protec-
tion function of the water
he
at exchanger
Failure of the frost protection function
of the water heat exchanger
because the water flow is too low. See fault code "7H".
Failure of the frost protection function of the water heat exchanger
because there is a lack of refrigerant in the system.
9004 7H Fault flow rate
Flow disruption water cir-
cuit
Water flow is too low or there is none at all, minimum water flow
requ
ired:
– HPSU compact 4-8 kW: > 720 l/h
– HPSU compact 11-16 kW: > 900 l/h
Check the following items:
● All
stop valves of the water circuit must be completely open.
● Optional water filters must not be contaminated.
● System must run within its operating parameters.
● System
must be completely evacuated.
● Using the controller (rotary switch position ) check whether
sufficient water pressure (> 0.5 bar) is available.
● T
he external static pressure must correspond to the character-
istic curve in the technical data for the heat generator.
A higher pressure indicates internal resistance in the water
circuit.
● Expa
nsion tank is defective.
● If this fault occurs during defrost operation in the operating
mode room heating or hot water supply: With optional backup
heater: Check its power supply and fuses.
● In th
e switch cabinets of HPSU compact, check the pump
fuse (FU1) and circuit board fuse (F1).

Rotex HPSU compact 308 Specifications

General

Brand	Rotex
Model	HPSU compact 308
Category	Heat Pump
Language	English