Stiebel Eltron WWS 20 Manuel D'utilisation Et Installation page 48

OPERATION
Troubleshooting
Problem Cause
Er36 High pressure Actual value F1 in-
shutdown correct
DHW cylinder not full
Refrigerant circuit
Sludge or scale block-
ing condenser
Flow rate too low
Air in the system
Circulation pump is
jammed
Er47 Defrost error Intake air temperature
too low
Er57 Frost protec- Intake air temperature
tion heat source too low
HP symbol flashes Time interval for
testing the protective
anodes has expired
(approx. 1.5-2 years)
Messages on the display
CODE Meaning
E1H Sensor F1 faulty, lead break
E1L Sensor F1 faulty, short circuit Sensor checking
E2H Sensor F2 faulty, lead break
E2L Sensor F2 faulty, short circuit Sensor checking
E3H Sensor F3 faulty, lead break
E3L Sensor F3 faulty, short circuit Sensor checking
E4H Sensor F4 faulty, lead break
E4L Sensor F4 faulty, short circuit Sensor checking
EP Error in parameter memory
Er36 High pressure shutdown
Er47 Defrost error
Er57 Frost protection heat source
FroS Frost protection DHW cylinder Start immersion heater, if installed
StOP Power supply utility active
Cr id Set value increase active
If you cannot remedy the fault, notify your qualified contractor.
To facilitate and speed up your request, provide the number from
the type plate (000000-0000-000000).
Sensor values
All the control unit temperature sensors have the same charac-
teristics: PTC, type KTY81-121.
Temperature [°C] Resistance [Ohm] Maximum deviation [+/-°C]
-10
-9
-8
-7
-6
-5
-4
48 | WWS 20
Remedy
Qualified contractor to check
sensor F1
DHW cylinder filling
Customer support notification
Clean condenser, replace if nec-
essary
Check external pressure drops
and compare with a reliable
pressure drop (see chapter "Spec-
ification")
Check whether the system has
been vented (see chapter "Com-
missioning / Filling the DHW
cylinder")
Unjamming circulation pump
Set heat pump to "OFF" and heat
domestic hot water temporarily
with immersion heater
Set heat pump to "oFF" and heat
domestic hot water temporarily
with immersion heater,
Install ventilation flaps
Test protective anodes and re-
place if necessary, qualified con-
tractor to reset the timer
Remedy
Sensor checking
Sensor checking
Sensor checking
Sensor checking
Appliance disconnection from power
supply then reconnection
Acknowledge error with OK
Acknowledge error with OK
Error is acknowledged automatically
Error is acknowledged automatically
once the fault has been remedied
See chapter "Operation with external
signal transmitter"
739.9
739.9
753.0
759.5
766.2
772.8
779.5
Temperature [°C] Resistance [Ohm] Maximum deviation [+/-°C]
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
2.1
2.1
2.0
2.0
2.0
2.0
2.0
786.3
793.1
799.9
806.7
813.6
820.5
827.5
834.5
841.5
848.6
855.7
862.8
870.0
877.2
884.5
891.8
899.1
906.5
913.9
921.3
928.8
936.3
943.9
951.5
959.1
966.8
974.5
982.2
990.0
997.8
1005.7
1013.6
1021.5
1029.4
1037.4
1045.5
1053.5
1061.7
1069.8
1078.0
1086.2
1094.5
1102.8
1111.1
1119.5
1127.9
1136.3
1144.8
1153.3
1161.9
1170.5
1179.1
1187.8
1196.5
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