Installation manual

38GL_M…G
R-410A
GB - 14
Troubleshooting
Compressor and fan of the outdoor unit will not start:
• Unit not energized; check the mains power connections.
• Main switch OFF; check and put to the ON position.
• Main switch fuses have blown; replace.
• Wait for 3 minutes; compressor cycling protection is on.
• Accessory pressure switch open; check and eliminate cause.
• Mains voltage too low.
• Electrical connections loose or wrong; check and repair.
Compressor will not start, but outdoor fan is running:
• Electrical connections of compressor loose or wrong; check and
repair.
• Compressor burnt out, seized or protection device on; check for
the cause and replace compressor if necessary.
• Run capacitor faulty; replace.
Compressor starts, but stops due to its overtemperature
protection (other than stops caused by the normal operation of
the thermostat):
• Wrong refrigerant charge (excessive or low) or air or other non
condensable gases in the circuit; drain refrigerant (see note 1),
evacuate and recharge.
• Mains voltage wrong (too high or too low).
• Condenser coil obstructed; remove obstructions.
• Outdoor fan off; check cause and repair.
• Run capacitor faulty; check and replace.
• Wrong indoor unit thermostat; replace.
• Refrigerant circuit clogged; check and remove obstructions.
• Expansion device clogged or covered with ice; drain refrigerant
(see note 1), evacuate and recharge.
Compressor runs continuously:
• Unit selected too small for actual air conditioning needs.
• Indoor temperature selection too low; check temperature
selection.
• Refrigerant charge low; check and add refrigerant.
• Compressor valves broken; replace compressor.
• Condenser fan faulty; replace.
• Air or other non condensable gases in the circuit; drain refrigerant
(see note 1), evacuate and recharge.
• Obstructions at air intake or dirty indoor unit filters; remove
obstruction or clean filter.
Discharge pressure too high:
• Outdoor coil dirty or obstructed; clean or remove obstructions.
• Condenser fan faulty; replace.
• Refrigerant charge too high; drain some refrigerant (see note 1).
• Air or other non-condensable gases in the circuit; drain refrigerant
(see note 1), evacuate and recharge.
Discharge pressure too low:
• Refrigerant charge too low; add refrigerant.
• Compressor valves broken; replace compressor.
• Outdoor coil dirty or obstructed; clean or remove obstructions.
• Indoor unit air filter dirty; clean filter.
Suction pressure too high:
• Compressor valves broken; replace.
• Internal high pressure relief valve open; check for cause and
repair.
• Refrigerant charge too high; drain some refrigerant (see note 1).
Suction pressure too low:
• Refrigerant charge too low; add refrigerant.
• Evaporator coil covered with ice; see the following points.
• Air circulation on the evaporator unit not sufficient; check for the
cause and repair.
• Expansion device or suction line clogged: check and repair.
Outdoor fan cycling due to its overtemperature protection:
• Fan capacitor faulty; replace.
• Electrical connection loose; check connections.
• Fan bearing seized; check and repair.
• Expansion device clogged or covered with ice; drain refrigerant
(see note 1), evacuate and recharge.
Note 1:
Do not release refrigerant to the atmosphere; use
refrigerant recovery equipment.
Guide for the owner
When installation and tests are completed explain the Operation
and Maintenance Manual to the owner, with particular attention to
the main operating modes of the air conditioner, such as:
• Turning the unit on and off.
• Functions of the remote control.
• Removal and cleaning of the air filters.
Leave the two installation manuals for the indoor and outdoor units
with the owner for future use during maintenance operations or for
any other needs.
Troubleshooting, guide for the owner and accessories
Table V: Accessories
Description Part number 38GL_M…G
2M12G 2M18G 2M24G 3M21G 4M24G
Wall bracket kit
38YL-900---002-40
앬
Wall bracket kit
38YL-900---001-40
앬앬
PTC starting kit (*): 2
38YL-900---010-40
앬앬앬앬앬
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