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Siemens Building Technologies Basic documentation RVD240 CE1P2384en
HVAC Products 25 Function block Test and display 27.05.2004
9 B32 storage tank temperature
10 B12 flow temperature heating circuit 2
11 – --- (not available)
Using the line selection buttons and , it is possible to switch from the sensor test
to the setpoint test, and vice versa; in that case, the selected code is maintained.
25.4 Relay test
The relay test is made to manually energize each relay contained in the RVD240 in
order to check its status. The relays are energized by pressing the setting buttons
and
.
Each relay is assigned a code:
Code Response or current state
0 Normal operation (no test)
1 All relays deenergized
2 Relay at terminal Y1 energized
3 Relay at terminal Y2 energized
4 Relay at terminal Q1 energized
5 Relay at terminal Q3 energized
6 Relay at terminal Y5 energized
7 Relay at terminal Y6 energized
8 Relay at terminal Q2 energized
9 Relay at terminal Y7 / Q4 energized
10 Relay at terminal Y8 / K6 energized
Before making the relay test, always close the main valve!
The relay test is terminated as follows:
• Select another operating line, or
• Press any of the operating mode buttons, or
• Switch to manual operation, or
• Automatically after 8 minutes
25.5 Display of the pump speed
The display is made on operating line 164; the speed of the pump selected on operat-
ing line 57 is given as a percentage of the nominal speed.
25.6 Display of the digital inputs
On operating line 165, information about the digital input variables is available. Interro-
gation is made with the setting buttons
and . For identification, the display format
is used.
At input H5, it is possible to receive pulses. Such pulses can be, for instance:
• Heat demand signal
• Signals from an alarm contact
• Pulses from the flow switch
The current state of the contact can be queried:
0 = contact open
1 = contact closed
The display shows H5 and 0 or 1
Caution
Contact H5
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