GB - 12
Istruzioni d’installazione supplementari
38GLP---G / 38GLP---G9
Unit maintenance, troubleshooting and guide for the owner
Indoor unit coil
The following maintenance operations must be carried out by
qualified personnel.
Cleaning the coil
When necessary, proceed as follows for more careful cleaning of
the coil:
Switch the mains supply OFF.
Remove unit top cover by loosening holding screws and lifting
the cover.
Carefully clean the coil with a vacuum cleaner from inside to outside.
With the same vacuum cleaner, dust the inside of the fan
compartment and the fan blades.
Avoid any damage to the blades which may cause future vibrations
and noise.
Replace the unit cover and tighten the screws.
After long shutdown periods and at commissioning
Energize the system by putting the main switch to ON without
starting the unit. (Remote control must be in the OFF position).
Do not disconnect the main switch during the unit operating season.
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.
• 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 (single-phase models); 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 (outdoor or indoor, in case of heat pump operation)
obstructed; remove obstructions.
• Outdoor fan off; check cause and repair.
• Run capacitor faulty; check and 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.
• Unit selected at a too low indoor temperature (cool only); change
selection.
• Refrigerant charge low; check and add refrigerant.
• Outdoor unit 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 (outdoor or indoor, in case of heat pump operation)
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.
• Head pressure controller prevents the fan motor from reaching the
maximum speed. Check the head pressure controller operation by
connecting the fan directly.
Discharge pressure too low:
• Refrigerant charge too low; add refrigerant.
• The indoor coil or gas pipe are clogged; remove the obstruction.
• Indoor unit air filter dirty; clean filter.
Suction pressure too high:
• Refrigerant charge too high; drain some refrigerant (see note 1).
Suction pressure too low:
• Refrigerant charge too low; add refrigerant.
• Evaporator coil (indoor or outdoor, in case of heat pump
models),covered with ice; see the following points.
• Air shortage to the evaporator unit; check and repair and check
indoor unit fan operation.
• Expansion device or suction line clogged: check and repair.
• The outdoor unit fan does not work according to head pressure;
check the controller operation.
Outdoor fan cycling due to its overtemperature protection:
• Fan capacitor faulty; replace.
• Electrical connection loose; check connections.
• Fan bearing seized; check and repair.
• Head pressure controller faulty. Check the controller operation by
connecting it directly to the outdoor fan.
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.
Table V: Accessoires
Description
Part number
Mod. 38GLP
18 24 28 36 48 60
Wall bracket kit
38YL-900---001-40
앬 앬
