SystemAir ROOFTAIR Serie Manual De Instalación Y De Mantenimiento página 28

Problem
Electrical circuit problems.
Fans do not operate
Internal circuit thermal cut-out activated.
Duct network pressure too low.
Fan surging
Compressor operating fault.
Reduced output in both
Low indoor air flow.
Heating and Cooling
Outdoor coil dirty.
mode
Insufficient refrigerant charge.
No power supply.
Electric heater is not
operating.
Heater circuit open (overheat).
Probable cause
Check the connections.
Contact an approved Service Centre.
Generate an additional pressure loss (refer to aeraulic
curves).
Contact an approved Service Centre.
Check filter, blower and duct.
Clean the coil.
Add refrigerant charge.
Check the main fuse and the auxiliary fuses.
Check the air flow or filter.
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Solution