INNOV@ ECFAN DMR -AGU-0912-E • 16 •
9.2 Periodical checks
To guarantee a constantly satisfactory performance over time, it is advisable to carry out routine maintenance and
checks as described below.
Tab. 8 Periodical checks
Operation Frequency
Check the efficiency of all the control and safety devices. Once a year
Check the terminals on the electric control board and compressor terminal boards to ensure that they are
securely tightened. The movable and fixed contacts of the circuit breakers must be periodically cleaned and
replaced whenever they show signs of deterioration.
Every 6 mos.
Check the refrigerant level by means of the liquid level indicator. Every 6 mos.
Check the efficiency of the differential air pressure switch and dirty filter differential pressure switch. Every 6 mos.
Check the condition of the air filter and replace it if necessary. Every 6 mos.
Check the humidity indicator (green = dry, yellow = humid) on the liquid level indicator; if the indicator is not
green as shown on the indicator sticker, replace the filter.
Every 6 mos.
Fig. 11 Inspecting the air filter
Fig. 12 Purging the air out of the water coil (CW version)
Open the unit front panels
Check the condition of the filter
and replace it if necessary
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