CCS800 | Service manual | Chapter 7 | Diagnostics and faultfinding en | 39
Bosch Security Systems | 2005-01| 3922 880 21112
7.5.8 Chairman Only mode
Set the Mode switch at the CPSU successively in the Test and Chairman Only mode.
Measure the DC-voltage via M33 related to M8 (0V).
Mode switch M33
Test mode > 4.0V (ORM is activated)
Override mode < 0.5V (ORM is inactive)
7.5.8.1 Delegate microphone temporary off when pressing the priority button at the Chairman unit(s) (TRMO)
• Connect a Delegate and a Chairman unit to the CPSU.
• Set the Microphone switch of the chairman unit (see Priority button) in position 0.
• Press the microphone button on the Delegate unit. The light ring illuminates.
• Press the priority button of the Chairman unit. The light ring goes out.
• Release the priority button. The microphone and light ring of the Delegate unit goes on again.
• Measure the DC-voltage for each step via M33 related to M8 (0V).
Microphone switch Priority button M33
position 0 on > 4.0V (TRMO- is inactive)
position 0 off < 0.5V (TRMO- is activated)
7.5.8.2 Delegate microphone permanently off when pressing the priority button at the Chairman unit(s) (RMO)
• Connect a Delegate and a Chairman unit to the CPSU.
• Set the Microphone switch of the chairman unit (see Priority button) in position 1.
• Press the microphone button on the Delegate unit. The light ring illuminates.
• Press the priority button of the Chairman unit. The light ring goes out.
• Release the priority button. The microphone and light ring of the Delegate unit stays off.
• Measure the DC-voltage for each step via M34 related to M8 (0V).
Microphone switch Priority button M34
position 1 on < 0.5V (RMO is inactive)
position 1 off > 4.0V (RMO is activated)
7.5.8.3 Priority switch (only for Chairman units)
• Connect a Chairman unit to the CPSU.
• Press the Priority button at the Chairman Unit.
• The Light-ring must illuminate now.
• A chime tone will now be emitted depending on the position of the chime switch. This switch is accessible by
removing the cable relief bracket (0=no chime at priority, 1=chime at priority).
• Set the microphone switch (located near the chime switch) successively in position 0 and 1.
• Keep the Priority button pressed and measure the DC-voltage via M5, related to M2 (GND).
Mode switch Microphone switch M5
n.a. 0 = permanent OFF > 13.35V (RMO activated)
n.a. 1 = temporary OFF between 8.7V and 10.11V (TRMO- is activated)
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