Trouble Shooting; Alarm Installation - Marstair A2LSYSTEMATCH SMC 15 Technical Manual

3I TROUBLE SHOOTING
Problem
The product does not
operate
Fans are not operate
Temperature is too high
Defrost is not working
Not enough air flow
Noisy operation
3J ALARM INSTALLATION
A method of alarm is required identify a potential loss of gas. This can be a cold room out of limited alarm, or
something more specific.
In the case of a leak the alarm should as a minimum either: -
•
Alarm lamp flashing or lighting
•
Alarm horn sounding
•
Display warning on equipment controller
If leak detection is installed, it should be either the sensor type or via existing pressure sensing devices. The leak
detection method (sensor type), needs to be calibrated/tested annually and sensitive to < 20% of the lower
flammability level of the refrigerant. If the detector uses a drop in pressure, then it needs to be tested for correct
operation. If a pressure type of detector is used, due to the inaccuracy of this method, the operator should assume
that a flammable mixture could be present within the cold room and appropriate action must be taken.
Reason
-Power is off
-Connection damage
-Power is off
-Block of rotation
-Heat exchanger is covered
with ice
-Not enough refrigerant
-Leakage
-Power is off
-Electrical connections
loosen
-Polluted heat exchanger
-Heat exchanger is covered
with ice
-Icing occurs on fan surface
-Fan blade damage
-Refrigerant noise
37
Solution
-Check the power. Check the
fuses
-Check connections
-Check the power
-Be sure fan runs smoothly
and freely
-Check the heat exchanger
fin surfaces
-Add refrigerant
-May be a fault before
evaporator inlet.
- Check for gas leaks. If
there is no leakage add the
correct amount of gas, if
there is a leakage, check
the "leakage occurs" section.
-Check the power
-Control the electrical wiring
-If there is heater malfunction,
change it with new one.
-Clean the fin surface
-Deice the heat exchanger
fin surfaces
-Deice the fan surfaces
-Change fans
-Get in contact with the
project firm
55008432-02