Hitachi YUTAKI RWM-2R1E User Manual

13.1.7 Test and check
Finally, test and check the following items:
• Water leakage
• Refrigerant leakage
• Electrical connection
• ...
? NOTE
Please refer to the chapters of “6.3.3 Refrigerant charge”, “6.5.3.1 Water lling” and “14 Commissioning” in this document and refer the Outdoor unit
Installation and Operation manual for the specic details about refrigerant charge tasks.
! DANGER
Do not connect the power supply to the indoor unit prior to lling the space heating circuit (and DHW circuit if it were the case) with water
and checking water pressure and the total absence of any water leakage.
13.2 MAINTENANCE WORK
! CAUTION
• All inspections and checks have to be carried out by a licensed technician and never by the user itself.
• Before any inspection and check the unit main power supply has to be switched OFF.
• Wait a minimum off 10 minutes from all power supply have been turned OFF.
• Take care with the crankcase heater. It could operate even when compressor is OFF.
• Take care with the electrical box components. Some of them could remain hot after switching OFF the unit.
? NOTE
All these maintenance operations must be done with appropriate materials and following this manual.
13.2.1 General maintenance procedure for the outdoor unit
1 Fan and fan motor
• Lubrication: All the fan motors are pre-lubricated and sealed at factory. Therefore no lubrication maintenance is required.
• Sound and vibration: Check for abnormal sounds and vibrations.
• Rotation: Check the clockwise rotation and the rotating speed.
• Insulation: Check the electrical insulation resistance.
2 Heat exchanger
• Clog: Inspect the heat exchanger at regular intervals and remove any accumulated dirt and any accumulated dust from the
heat exchanger. Other obstacles must be removed such as the growing grass and the pieces of paper which might restrict
the airow.
3 Refrigerant piping connection
• Leakage: Check for the refrigerant leakage at the piping connection between the outdoor and the indoor unit.
• Pressure: On split system, check the refrigerant pressure using the check joints of the outdoor unit.
4 Cabinet
• Stain: Check for any stain and remove it cleaning if it is the case.
• Fixing screw: Check for any loosened screw or any lost screw. Fix the loosened screws and the lost screws.
• Insulation material: Check for any peeled thermal insulator on the cabinet. Repair the thermal insulator.
MAINTENANCE
PMML0575 rev.2 - 03/2022
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Hitachi YUTAKI RWM-2R1E Specifications

General

Brand	Hitachi
Model	YUTAKI RWM-2R1E
Category	Air Conditioner
Language	English