Mitsubishi RC-E5 User Manual page 21

outdoor
[Mainly parts and built-in components]
*The distinction between the indoor and outdoor assumes the air conditioner for a store and a multiple-air conditioner for a building. This may vary depending on the configuration of the unit, such as equipment air conditioner.
Part Name
Part Name Details of Inspection
- Check of peeling off and fl oating of paint coating
Guard, etc. - Check of fractures and cracks of plastic parts
Structural - Check of rust and peeling off of the heat insulation
component Frame, bottom plate, etc. material
- Check of peeling off and fl oating of paint coating
- Check of deterioration and hardening of rubber
Vibration-proof rubber
- Visual check of vibration and balance
Fan
Fan casing - Check of dust adhesion and appearance
Ventilation
- Sound audibility check
system
parts Fan motor - Insulation resistance measurement
- Regular lubrication is required
Bearing
- Sound audibility and vibration at the start-up,
operation, and stop
Compressor - Insulation resistance measurement (after
energizing the manufacturer designated time)
- Looseness of terminals and contact of wiring
- Check the clogging and damage due to foreign
Air heat exchanger objects
- Gas leakage
- Sympathetic vibration, contact, and corrosion of
the piping in the unit
Piping in the unit
- Sympathetic vibration and contact of capillary tube
Refrigerant
- Operation check
system
Electronic expansion valve - Operation sound by power on/off (pressure check)
parts
- Operation and insulation performances of
Electromagnetic valve, four electromagnetic valve, four way switching valve, etc.
way switching valve, etc. - Corrosion, abnormal sound
Container, etc. - Corrosion of accumulator, oil separator, etc.
- Operation pressure, gas leakage, insulation
Pressure
Protection
resistance
shutoff device
device
(security
- Appearance check (swelling of fusible alloy)
parts)
Fusible plug
Note 1) Random fault is an unexpected failure which occurs before
the wear is progressed, within the service life of the parts and
equipment. It is difficult to establish a technological measure
against the random fault. At the moment, statistical handling is the
only measure against the random fault.
20
Regular Inspection
Inspection Method Criteria <Standard>
Visual inspection - There should be no extreme rust generation,
cracks, fracture, etc.
Visual inspection - There should be no extreme rust or damage of heat
insulation material
Visual and audible - Vibration insulation function should not be
inspection impaired
Visual inspection - Should not be in an extremely vibrating condition
Visual inspection - There should be no extreme rust or deformation
Audible inspection - There should be no abnormal sound generation
500 V mega - The resistance value should be 1 M or more
Audible inspection - There should be no abnormal sound generation
Visual, audible, and - There should be no abnormal sound or vibration
tactile inspection
500 V mega - The resistance value should be 1 M or more
Driver, visual inspection - There should be no looseness or contact
Visual inspection - There should be no clogging or damage
Gas detector - No leakage should be detected
Visual inspection - There should be no abnormal sympathetic
vibration, sound, or corrosion
Visual inspection - There should be no abnormal sympathetic vibration
or contact wear
Tactile inspection - Circulation of refrigerant should be felt
Audible and tactile - There should be driving sound and temperature
inspection change
500 V mega - The resistance value should be 1 M or more
Visual and audible - There should be no abnormal sound or corrosion
inspection
Visual inspection - There should be no abnormal corrosion
Pressure gauge, etc. - Operate it at a setting value
- Observe the rules specifi ed by the laws and
regulations
Visual inspection - The fusible alloy should be in a normal position
Note 2) The elapsed year marked with * assumes the operating time
as 10 hours/day and 2500 hours/year in a normal operating
condition without frequent start/stop. This may vary according to
the operating condition. Please check the calculation basis of the
elapsed year when making a maintenance contract.
Explanation of symbols
: Conduct the cleaning and adjustment according to the inspection result
: In case of abnormality after inspection, replace or repair the corresponding part.
: Conduct the periodic replacement (consumable components)
Preventive Maintenance*
Inspection Maintenance Interval
Details of Maintenance
Interval (Used Hours/Duration)
- Paintwork by repair coating
- Replace it if there is any damage, such as cracks 8 years
and fracture.
- If the heat insulation material is peeled off, repair
and stick it 8 years
- Paintwork by repair coating
- Replace it when deteriorated or hardened
10 years
- Replace it in case of vibration and extreme
unbalance
10 years
- Clean with a brush or wash with water in case of
extreme dust adhesion
- When a bearing sound is loud, replace the bearing
- When the resistance value is 1 M or less, replace 20,000 Hr
the motor
- Replace parts regularly
15,000 Hr
- Replace it if abnormal
Every year
- Replace it if the resistance value is 1 M or less 20,000 Hr
Before
the air-
- Retighten. Correction of wiring path
conditioning
- Wash the air infl ow side in case of clogging
season
5 years
- Repair or replace it when gas leakage is detected
- Replace it or readjust the piping when extremely
corroded
20,000 Hr
- Replace it or readjust the piping when extremely
worn
- Replace it when locking occurs
20,000 Hr
- Replace it if the resistance value is 1 M or less
20,000 Hr
- Repair coating in case of corrosion generation 20,000 Hr
- Replace it if it does not operate within the
permissible range of setting values 25,000 Hr
- Replace the device if fusible alloy is swelling out of
15,000 Hr
the normal position
Note 3) illustrates the estimated timing when the wear-out
failure starts and how the failure rate increases as the time passes.
: Random failure
: Wear-out failure
Elapsed Years
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Cleaning object item

Cleaning object item



Consumable
 
components

Cleaning object item
    
Due to atmospheric
dirt





 
Remarks