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AUTOMATIC CONTROLS
5. AUTOMATIC CONTROLS
The system is equipped with the following functions.
¡
THREE MINUTE GUARD
The compressor remains off for at least 3 minutes once it
has stopped. If the system is started within approximately 3
minutes after it has stopped, the RUN indicator is activated.
However, the cooling operation for the heating operation
remains off and does not start until 3 minutes has elapsed.
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AUTOMATIC RESTART AFTER POWER FAILURE
If the power supply is interrupted the Remote Control Switch
ill retain the settings and the unit will restart when the power
is restored.
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AUTOMATIC DEFROSTING CYCLE
When the heating operation is stopped by pressing RUN/
STOP switch, frosting on the outdoor unit is checked and the
defrosting operation may be performed for the maximum of
10 minutes.
6. BASIC TROUBLESHOOTING
CAUTION:
When water leakage from the indoor unit occurs, stop the
operation and contact your contractor.
When you smell or white smoke occurs from the unit,
stop the system and contact your contractor.
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THIS IS NOT ABNORMAL
Sound from deforming Part
−
During system starting or stopng, and abrading sound
might be heard. However, this is due to thermal
deformation of plastic parts. It is not abnormal.
Refrigerant Flow Sound
−
While the system is being started or stopping, sound
from the refrigerant flow should be heard.
Steam from Outdoor Heat Exchanger
−
During defrosting operation, ice on the outdoor heat
exchanger is melted, resulting in making steam.
Sound for the indoor unit heat exchanger
−
During the cooling operation, a sound may be heard
from the indoor unit heat exchanger due to water
freezing or melting.
Water noise
−
During starting or stopping of the unit, noise can appear
in water piping.
During defrost
−
Noise can appear in unit due to defrosting of water.
PMML138A_R1-eng-fre.indb 15
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PREVENTION OF LOW WATER PRESSURE
Unit is equipped with a low-level pressure switch that will
be activated at 1 bar. Rearming is automatic and will be
activated when pressure rises above 1.5 bar.
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PREVENTION OF HIGHT WATER PRESSURE
Unit is equipped with a security valve that will be activated at
more than 3 bars.
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PREVENTION OF LOW WATER FLOW
Unit is equipped with a flow-switch, which will be activated at
flow less than 6l/min
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MAXIMUM WATER TEMPERATURE CONTROL
The AquaFREE standard unit is equipped with a Water
thermostat security, which limits water temperature to 65ºC.
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NO OPERATION
Check whether the SET TEMPERATURE is set at the correct
temperature.
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NOT COOLING WELL OR HEATING WELL
Check for obstruction of water circuit.
−
Check if too much heat source exists in the room.
−
Check if the temperature condition is not within the
−
operating range.
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IF TROUBLE STILL REMAINS...
If the trouble still remains even after checking the above
items, contact your service contractor and inform the
following data:
Unit Model Name
−
Content of Trouble
−
Alarm Code no. on Liquid Crystal Display
−
NOTE:
Except for a long period of shutdown, keep the main switch
ON, since the oil heater is energised when the compressor
is stopped.
PMML0138A-rev.1 - 11/2009
15
19/11/2009 14:44:29
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