dormakaba 1856 HT SD, 1856 SFT SD Installation Instructions
08220880
03-2020
1800 Closer
21
Maintenance
Measure and record test voltage at test
points RP1 & RP2. If the product is
operating normally, and was cleaned
effectively, the test voltage will be less
than the voltage recorded earlier (typical
voltage for a clean device is 1.27-3.38
VDC).
RP1
RP2
6.2 Measure and record test voltage
Fig.32
1. First, vacuum or blow off any loose debris on outside of cover. Then, remove the detector cover and screen
assembly by rotating a flat screwdriver in slot (both sides) and pulling it straight up. Cover may be difficult
to remove the first time.
2. Vacuum all areas illustrated below, and then blow off same areas with compressed air. Before
reassembling the detector, be sure all parts are free of debris.
6.3 Vacuum detector
Fig.33
Under
cover
Fins
Cover
Screens
Photo
chamber
3. Replace cover and screen assembly.
4. Measure and record test voltage at test points RP1 & RP2. If the product is operating normally, and was
cleaning effectively, the test voltage will be less than the voltage recorded earlier. (Typicaly voltage for a
clean device is .9 - 1.58 VDC).
