SR981S/SR982S operation manual of solar pump station
Page 81 of 85
“P1/P2” flashes on the
screen
1. Blade of electrical
flow meter is jammed
2.No heat transfer liquid
in system
3. Pump is damaged.
1. Dismantle the connected
pipe of pump station, clean
pipeline with high pressure
water gun,
2. Refill heat transfer liquid
3. Replace pump
Warning
！
Remove the device from the mains supply before opening the case
A potentially defective sensor can be checked using an ohmmeter. To do this, the sensor
must be disconnected, its resistance measured, and the numerical value compared with
the figure in the table below, small deviation (±1%) is acceptable.
PT1000 resistance value
o
C
0
10
20
30
40
50
60
70
80
90
100
110
120
Ω
1000
1039
1077
1116
1155
1194
1232
1270
1309
1347
1385
1422
1460
NTC 10K B=3950 resistance value
o
C
0
10
20
30
40
50
60
70
80
90
100
110
120
Ω
33620
20174
12535
8037
5301
3588
2486
1759
1270
933
697
529
407
11. Quality Guarantee
Manufacturer provides following quality responsibilities to end-users: within the period of
quality responsibilities, manufacturer will exclude the failure caused by production and
material selection. A correct installation will not lead to failure. When a user takes incorrect
handling way, incorrect installation, improper or crude handling, and wrong connection of
sensor in system and incorrect operation, the quality responsibility is invalid for them.
The quality warranty expires within 18 months after the date of purchasing the controller.
