Maintenance And Inspection Guideline Of Main Parts Of Packaged Air Conditioner - Mitsubishi RC-E5 User Manual

MAINTENANCE AND INSPECTION GUIDELINE OF MAIN PARTS OF PACKAGED AIR CONDITIONER

This table indicates the details of regular inspection items and their intervals
(inspection interval), and the timing of parts replacement under a normal
use condition. If the equipment falls into a certain category specified
by the laws and regulations of each country, conduct the maintenance
and inspection according to the specified rules too. As to the preventive
maintenance, the regular inspection interval is indicated as the "inspection
interval," and the predicted interval of the "implementation of cleaning and
indoor
[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
Decorative panel - Check of dirt and scratch
(design part)
- Visual check of dirt and scratch
Intake/outlet grills - Outlet grill louver operation check
Structural
component
- Check of rust and peeling off of the heat insulation
Frame, bottom
material
plate, etc.
- Check of peeling off and fl oating of paint coating
Vibration-proof - Check of deterioration and hardening of rubber
rubber
- Visual check of dirt and breakage
Filter
- 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
Automatic louver - Insulation resistance, abnormal sound generation
motor
- Check the clogging of foreign matters and the fl ow
of drain water
Drain pan
- Check of peeling off and fl oating of paint coating
- Check the drainage condition
Drain system
- Check the clogging and dirt of the water supply and
Drain pump
parts
drainage outlet
- Insulation resistance
Dewing preventing - Insulation resistance, appearance check
heater
Float switch - Operation check
- 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
system parts
- Operation check
Electronic expansion
- Operation sound by power on/off (pressure check)
valve
- Operation and insulation performances of
Electromagnetic
electromagnetic valve, four way switching valve, etc.
valve, four way
- Corrosion, abnormal sound
switching valve, etc.
- Circuit insulation resistance check
Electric component - Terminal part, connector looseness check
box
(including inverter)
Electric and
Switching power - Output voltage measurement
electronic
source transformer
parts
Temperature sensor - Open, short circuit, earth, appearance check
Humidistat
Remote control - Check the controllability by the operation
switch
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.
adjustment" or "implementation of parts replacement and repair" according
to the result of the regular inspection is indicated as the "maintenance
interval." As to the cleaning and adjustment, the timing is set to prevent the
deterioration of parts and the degradation of performance. As to the parts
replacement and repair after the inspection, the timing is set by estimating
the operation time or use time, when the wear-out failure period is reached.
Regular Inspection
Inspection Method Criteria <Standard>
Visual inspection - There should be no extreme dirt, scratches, or
deformation
Visual inspection - There should be no extreme scratches or
deformation
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 - Filter material should be seen through
- There should be no breakage or deformation
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
500 V mega, audible - The resistance value should be 1 M or more,
inspection there should be no abnormal sound
Visual inspection - There should be no drainage clogging
- There should be no abnormal rust generation and
hole opening
Visual inspection - Should be drained normally
Visual inspection - There should be no clogging or dirt
500 V mega - The resistance value should be 1 M or more
500 V mega, visual - The resistance value should be 1 M or more,
inspection there should be no abnormality
Tester - ON-OFF should operate normally
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
500 V mega - The resistance value should be 1 M or more
Driver, visual - There should be no looseness at the connecting
inspection part
- There should be no deposited foreign matter
- There should be no abnormal display
Tester - Output voltage should be within a specifi ed value
Tester, visual - Should be of a specifi ed resistance value
inspection - There should be no cracking or discoloration
Visual inspection - LCD should display as operated
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)
- Cleaning with neutral detergent, paintwork by
8 years
repair coating
- Repair or replace it if deformed or damaged
Every year
- Replace the bearing, motor, etc. when 8 years
Before
malfunctioning
the air-
- If the heat insulation material is peeled off, repair
conditioning
and stick it 8 years
season
- Paintwork by repair coating
- Replace it when deteriorated or hardened
10 years
- Clean it if it is dirty Every week
5 years
- Replace it if it is broken Note 4
- Replace it in case of vibration and extreme
unbalance
13 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 the resistance value is 1 M or less
20,000 Hr
- Cleaning of drain pan, inclination check
8 years
- Repair coating or replace the drain pan depending
on the problem level
- Replace it in case of drain defect
- Clean it in case of clogging and dirt
20,000 Hr
- Replace it if the resistance value is 1 M or less
- Replace it if the resistance value is 1 M or less
20,000 Hr
- Replace it in case of malfunction 20,000 Hr
Every year
Before
- Wash the air infl ow side in case of clogging
the air-
5 years
conditioning
- Repair or replace it when gas leakage is detected
season
- 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
- Clean with a brush in case of extreme dust
adhesion
- Replace it if the resistance value is 1 M or less 25,000 Hr
- Retighten or reinsert it if there is looseness
- Replace it if there is voltage abnormality
10 years
- Replace it in case of disconnection and short
5 years
circuit
- Replace it in case of failure of the following
25,000 Hr
capability of control and the display
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


Consumable
 
components


Cleaning object item



Cleaning object item
    
Due to atmospheric
dirt







Note 4) The inspection timing of filter is basically every week. However, the
contamination state varies depending on the type of filter and the
use condition. Therefore, conduct the inspection in arbitrary cycles
according to the use condition.
Remarks
19