Troubleshooting And Guide For The Owner - Carrier 38TYGxxxH7 series Installationsanweisung

38TYG---H7/38TYG---H9
38TYP---H7/38TYP---H9
Unit maintenance, troubleshooting and guide for the owner
Outdoor 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 and/or side panels 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.
• Mains voltage too low.
• Electrical connections loose or wrong; check and repair.
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 circulation on the evaporator unit not sufficient; check for the cause
and repair,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.
Note 1: Do not vent 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.
E N G L I S H
GB-26