6.2.3 Signalled statuses of outputs and critical unit parameters:
A1Z1
–
level 1 alarm at output in zone 1,
A1Z2
–
level 1 alarm at output in zone 2,
A2Z1
–
level 2 alarm at output in zone 1,
A2Z2
–
level 2 alarm at output in zone 2,
VAL1
-
pulses closing the valve at zone 1 output were generated,
VAL2
-
pulses closing the valve at zone 2 output were generated,
InA1
–
level 1 alarm at alarm input,
InA2
–
level 2 alarm at alarm input,
FDET
–
failure at detector’s input,
FACC
–
voltage of internal battery too low,
FVDC
–
failure of unit supply systems or external supply voltage 12V=
FVAC
–
failure of 230V~ supply,
ABSENT VALVE1
-
no valve at output of zone 1;
ABSENT VALVE2
-
no valve at output of zone 2;
6.2.4 Signalled operation modes:
SILENT MODE
- the quiet operation mode causes permanent switching off of the buzzer, to switch the
buzzer on: hold the “L” key for 5 seconds, to turn it off: again hold the “L” key for 5 seconds. The
setting is saved in the non-volatile memory of MDP and is active after power decay or resetting the
unit.
The temporary mode of “quiet operation” can concern external signalling by switching voltage
outputs of A2 threshold in both S1 and S2 zones for 15 minutes; to switch them on again:
simultaneously hold “L” and “OK” keys for > 5 seconds. In that mode the unit signals emergency
states and alarm states only with optical signals (diodes and the display). Switching the temporary
blocking on is signalled by counting down of the time left for its end. The temporary blocking of A2
voltage outputs is automatically switched off after 15 minutes or earlier, in case when a new A2
alarm appears on detectors’ inputs or after the user holds “L” and “OK” keys for > 5 seconds.
AUTO RESET
- described in section 5 in administrator menu.
SERVICE MODE
- described in section 5 in administrator menu.
MODBUS MASTER
- described in section 5 in administrator menu.
MODBUS SLAVE
- described in section 5 in administrator menu.
No sound or optical signals should be generated after correct installation, while switched on detectors should
ndic ed with “N” sign on the LCD screen.
be i
at
Control of MDP unit’s operation
is conducted by means of
the keyboard located in the front panel.
During normal operation additional functions are permanently assigned to the keyboard’s buttons. Pressing
and holding the button will respectively cause:
<OK> key (3 sec.) - unit reset;
<L> key (5 sec.) - switching the “silent mode” on/off;
<L> and <OK> keys - switching temporary blocking of 12V alarm outputs A2 on/off.
simultaneously <L> and <R> keys (5 sec.)- entering user menu;
<U> and <D> keys - adjustment of illumination of the LCD screen.
If other designations are visible on the LCD screen, yellow or red lamp is glowing and a sound signal is
audible, that means incorrect installation of the detectors. Then check the connections of the detectors
indicated on the LCD screen with a character other than "N" and "-" and remove the fault.
With the shut-off valve connected, the yellow light
[FAULT]
should be turned off. Lighting up these lights
accompanied with acoustic signal of piezoceramic buzzer and lighting of “
ABSENT VALVE1
" or “
ABSENT
VALVE2
” means that a valve/valves is/are not connected.
NOTE: In the case of MDP assuming temporary or constant operation with disconnected valves leave the
standard characteristic resistors in “VALVE” terminals.
DO NOT
short the terminals [VALVE] by means of
jumper pins!!! This can damage the internal battery or circuits of the unit during the generation of A2 status. It
is forbidden to operate MDP with a connected valve and characteristic resistor left in place!!!
All circuits of inputs have independent mechanisms supervising supply current of detectors. In case of
shorting of detector’s supply conduits, overload of supply line or improper polarization of “A” or “A16” conduit
automatic cut-off of power from a given occurs (status signalled on LCD screen with “Pr” sign, next to a
specific detector number and a constant sound signal). After removal of shorting or overload, MDP restarts
supply of a given line only after power supply of the unit is switched off and switched on again.
MDP-4(8,16)… Instruction Manual
edition 6PU63en
©gazex’2011 v1101
Page 19
/ 24