AT-MZA
Multi Zone Alarm
LEAK DETECTION SOLUTIONS
Weights & Measures House, 20 Barttelot Road,
Horsham, West Sussex RH12 1DQ
+44 (0) 1403 216100
info@aquilar.co.uk
www.aquilar.co.uk
O. TROUBLE SHOOTING
Problem:
Leak Alarm, but no leak is found.
Possible Cause:
Cable is dirty (TT1000, TT3000).
Action:
Clean cable using water (no solvents, acetone,
white spirit or turps). Dry the cable and
check MZA front panel. Heavily contaminated
cable may require replacement. But if dirt is
accumulating, cleaning and/or replacement
will eventually be required.
Problem:
Leak Alarm, but no leak is found.
Possible Cause:
Cable is exposed to occasional water spraying
(TT1000, TT3000)
Action:
It is best to keep the sensor cable at least
1 meter (3 feet) from the outflow of any air
conditioner units.
Problem:
Leak Alarm, but no leak is found.
Possible Cause:
Cable is in contact with sharp metal edges
(TT1000, TT3000)
Action:
Check the sensor cable for possible points of
contact with sharp edges such as the edges of
drip trays or the pipe threads on adjustable
floor supports, trunking and ducting.
Reposition the cable as necessary or insert a
small piece of insulating material to prevent
the cable from making contact with the metal
edge.
Problem:
Leak Alarm, but no leak is found.
Possible Cause:
Cable is pinched (all cables).
Action:
Check the sensor cable for possible pinch
points. TT5000 and TT5001 can be tripped if
tightly bent or compressed by a heavy object.
TT1000 and TT3000 can be tripped by heavy
pressure from a metallic object. Check the
entire cable installation for pinch points and
correct the condition.
Problem:
CABLE BREAK indication but cable appears to
be intact. Possible
Cause:
Loose connections at terminal block.
Action:
Check all terminal block screws for tightness.
To test the module by itself, use two small
pieces of wire to form temporary jumpers
from red to green and yellow to black at the
sensor cable terminal block. This simulates
a very short piece of sensor cable and the
yellow CABLE BREAK LED should go off. If the
MZA cannot pass the jumper wire test it may
require replacement.
Problem:
BMS/PLC or other host system detects a
fault when the MZA is operating in NORMAL
mode.
Possible
Cause:
Mains power has cycled. Logic controller has
powered relays incorrectly.
Action:
Press RESET button. This will clear any logic
power up anomalies, and the panel will now
function correctly.
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