Appendix
26
Installation and maintenance instructions aroSTOR 0020290840_00
Fault code
Description
Possible cause
Solution
Temporary operation
ERR. 01
Incorrect defrosting sensor
readings
Defrosting sensor incor-
rectly installed on the pipe.
Air temperature is meas-
ured
Re-establishing contact
between the defrosting
sensor and the pipe
Heat pump decommis-
sioned.
Heat pump out of gas
Leak in the cooling circuit
Finding and repairing the
leak before filling the cool-
ing circuit
Expansion valve shut down
Break in the copper pipe
for the expansion valve fol-
lowing interference or due
to contact with a vibrating
component.
Replacing the expansion
valve
Compressor shut down and
safety cut-out activated
Compressor defective
Replacing the compressor
ERR. 02
Incorrect temperature
sensor readings
–
The air temperature
and the water temper-
ature sensors have
been inverted on the
PCB.
–
The defrosting sensor
is connected on the
water connection plug.
The water temperature
sensor is connected to
the air connection plug,
and the air temperature
sensor is connected to
the defrosting connec-
tion plug.
Connecting sensors to the
PCB correctly
Product decommissioned.
ERR. 03
Incorrect temperature
sensor readings
The defrosting sensor is
connected on the water
connection plug. The wa-
ter temperature sensor is
connected to the air con-
nection plug, and the air
temperature sensor is con-
nected to the defrosting
connection plug.
Connecting sensors to the
PCB correctly
Product decommissioned.
ERR. 04
Incorrect defrosting and hot
water temperature sensor
readings
The defrosting sensor and
the water temperature
sensor have been inverted
on the PCB.
Connecting sensors to the
PCB correctly
Heat pump decommis-
sioned.
ERR. 08
Incorrect measurements by
the defrosting sensor
The defrosting sensor is
defective.
Replace the sensor
The product works in al-
ternating operation with the
heat pump.
EPrO
Display card has a storage
problem
–
Display card is dam-
aged
–
Display connection
cable is damaged
–
Replacing the display
card
–
Replacing the display
connection cable
Product decommissioned.
C
Installer level
–
Overview
Setting level
Values
Unit
Increment, select, explanation
Factory
setting
Min.
Max.
INST.MENU
→
PV MODE
→
PV MODE
Current value
YES
,
no
no
INST.MENU
→
PV MODE
→
PRIORITY
PRIORITY
Current value
YES
:
PV MODE
has higher priority than frost
protection and eco mode;
no
:
PV MODE
has
lower priority than frost protection and eco mode
YES
INST.MENU
→
DI SPLAY
→
WATE R
Current value
℃
AIR INLET
Current value
℃
T_EV APOR
Current value
℃
