41
warmhaus.com.tr
Check Error ALL30 ( RETURN Sensor ) indicated on LCD
Check the NTC Connector First.
Is the connector terminals female pins and male pins are bended OR
disconnected ?
Replace the Return NTC if sensor pins
are damaged
OR
Replace the cable if the pin connector
damaged.
NO
YES
RETURN NTC FAULT
Is there continuity between the PCB and the NTC?
Replace PCB
Remove the Return NTC from the heatexchanger disconnect the wires.
Check the resistance using a suitable multimeter connected across the thermis-
tor’s terminal pins.
At 25°C expect 10000 Ohms ( 10.300 - 9.700 )
At 60°C expect 2488 Ohms ( 2562 - 2413 )
At 80°C expect 1258 Ohms ( 1295 - 1220 )
Is the NTC resistance value correct?
Check and replace wiring as necessary
Replace the Return NTC with new&orgin-
al spare
NO
NO
YES
YES
YES
18) Return NTC Sensor
Measure 1-2 points via multimeter
T (°C)
R (Ohm)
0
32650
5
25388
10
19900
15
15709
20
12490
25
10000
30
8057
35
6531
40
5327
45
4369
50
3603
55
2986
60
2488
65
2083
70
1752
75
1481
80
1258
85
1072
90
918
95
789
100
680
4.8. RETURN NTC FAULT
Designation
Manufacturer
Type-model / Technical data
Release date
28.11.2017
Fault finding; Return NTC Sensor
Warmhaus
Viwa 90-115-125-150
Rev. No:
0
Drw. No:
WH.17.728
