Specifications

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6720649497 SM HP270-1 2012/09 en
2 Contacts Open on safety elements – high pressure switch Check Continuity
3 Contacts Open on safety elements – low pressure switch Check Continuity
Fault in the low pressure side
1 High pressure loss in the air ducts Check ducts and accessories equivalent length
2 Failure in fan operation Check fan operation and connection
3 Leakage in the refrigeration circuit
Check with an leakage detector the origin of the
leakage, repair and refill circuit.
4 Over current limiter activation Check compressor - blocked
5
Expansion valve does not leave correct amount of gas for
evaporator
Check bulb position and insulation
6 Expansion valve is blocked or bulb has lost charge
Repair by replacing the complete expansion
valve
7
Dry filter is saturated and block refrigerant flow
(filter outlet is much colder than inlet)
Replace filter
Code HOT Warning Code
Temperature of air admission higher than + 35ºC.
1
Self Reset error after normal temperature conditions are
reached
Code COLD Warning Code
Temperature of air admission lower than + 5ºC or - 10ºC according model.
1
Self Reset error after normal temperature conditions are
reached
Table 8 – Error codes identification
ATTENTION:
The technician for the repairs in the refrigeration unit of the heat pump, must have competences in
soldering, repairing and analysis of performance of the machine, to ensure safety and correct servicing of
the unit.
Only a certified technician, with adequate training from the respective entities in the country of destination, can give
the certificate of competence to the authorized persons to carry out service and maintenance in heat pump
machines.