Argo AMG21SDT Technical Data & Service Manual - Page 14

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Argo AMG21SDT Technical Data & Service Manual

7-5 Fan works at one speed only

Check electrical conec-
tions. Is there continuity ?
YES
Check power supply
between 1-7(high) or
1-8(low) electronic control
contacts (CE)
YES
Check fan motor winding
values (MV)
YES
Replace fan motor (MV)

7-6 Poor cooling

Is the unit cooling capacity
suitable for the room
thermal loads ?
YES
Are both air filters and heat
exchanger cleaned ?
YES
Check if Difference bet-
ween room air
temperature and outlet air
delivered is up to 10 °C
NO
normal operations
foreseen for the
NO
NO
NO
NO
YES
Low
gas charge
Proceed with
above points
14
Fit electrical connec -
tions properly
Replace the electronic
control (CE)
Suggest a more power-
ful unit
Clean filters and / or
heat exchanger
The unit works properly
NO