lack of possibility to establish RS232
serial transmission between the unit
and the computer
incorrect configuration of serial
communication parameters,
incorrect number of serial port,
blocking of serial port by other
software, damaged transmission
cable
close other programs using serial
port, change the number of serial
port or repair transmission cable
the “
FACC
” alarm state or valve(s)
is/are not closing, despite the A2 state
is generated and mechanical and
electrical efficiency of the valve(s) is
checked
internal battery discharged
leave the unit connected to mains
for min. 24 hours (battery charging),
repeat the attempt.
If the result is negative again - see
test below
as above, charging the battery does
not improve operation of MDP unit
(situation possible after several years
of operation).
Conduct an additional testing of
battery’s efficiency explicitly
specifying its suitability, as below:
1) prepare an efficient, charged gel
battery 12V (min. 5Ah for alarm
systems) or a car battery;
2) disconnect the connecting circuit
with the valve from “VALVE”
terminal;
3) connect battery clamps (neutral
polarization) to cable ends twice,
ONLY for a short moment (max. 0.5
sec.),
4)
closing
of the valve proves the
necessity of change an internal
battery for a new provided ONLY by
the manufacturer;
5)
not closing
the valve indicates
other causes beyond the MDP unit
(consult the Manufacturer)
6) check the other valve (if
connected) in a similar manner;
In the case of observing the effects other than the above please contact your Authorized Distributor or the Manufacturer.
7. MAINTENANCE / OPERATION
The
MDP
unit and
DEX/DG
detectors are electronic devices devoid of operating moving parts. They were built on
the basis of very durable semiconductor elements. Therefore, maintenance is reduced to Periodical System
Inspection .
7.1. Periodical System Inspection:
♦
clean dust off of MDP unit’s cover,
♦
check tightness of the transparent cover and gland ducts,
♦
check if the shut-off valve is open!
♦
notify all system users on the planned inspection or about planned cut-off of gas supply,
♦
System test acc. to section 6.3.
of this Instruction Manual.
R
ECOMMENDED FREQUENCY OF
MDP
PERIODICAL INSPECTION
not less frequent than
every 3 months
, is sufficient for testing
electrical-measurement properties of the Gas Monitoring System.
♦
The Periodic System Inspection should also be performed each time after the occurrence of specific
conditions in the system, i.e.:
– occurrence of extreme conditions, e.g. high gas concentration, high or very low temperature, high periodical
dustiness or increase in humidity,
– presence of high concentration of other gases, whose presence was not foreseen in the supervised zone,
– long-term operation with alarm state active,
– after a power stoppage for more than 1 hour,
– after occurrence of overvoltage or strong disturbances in electrical installation,
– after conduct of repair works or installation works, which can influence functioning of the system or its
configuration, etc.
7.2. During operation avoid using mobile phones, radio-telephones or other sources of strong electromagnetic field
in the direct vicinity of the MDP unit - their use can cause interferences of MDP unit’s operation and false alarms.
7.2.1 During operation MDP avoid temperatures above recommended threshold values (Chapter 3).
MDP-4(8,16)… Instruction Manual
edition 6PU63en
©gazex’2011 v1101
Page 22
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