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SUBTASK 21-00-09-21-002
7.2
Evaporator Module inspection schedule:
NOTE: This is the recommended visual inspection schedule for the Evaporator Module Assembly. Adherence to this schedule will ensure that all components of the assembly are in accordance with the manufacturer’s specifications and is necessary to detect structural failure, deterioration or damage, and to determine the need for corrective action.
7.2.1
If any component listed in this schedule requires cleaning, refer to Cleaning Procedure (Section 6).
7.2.2
If any component listed in this schedule requires repair and/or replacement, refer to Repair (Section 8).
Component
Type Inspection
Service Hours
Evaporator Coil Assembly
Inspect refrigerant plumbing for leakage
Inspect coil fins for cleanliness and damage
Inspect cold air ducting for leaking cracks or damage
500-800
Evaporator housing Assembly
Shroud Assembly
Escutcheon
Water Deflector
Inspect seam between shroud assembly and escutcheon for signs of separation and condensate leakage.
Inspect for cleanliness and damage/integrity.
Inspect condensate drain, making sure hole is clear and secure.
500-800
Blower Assembly
Blower Motor
Blower Wheel
Blower Scroll
Inspect for cleanliness and damage/integrity
Verify that blower wheel is clean and operates vibration free.
500-800
Blower Motor must be removed and replaced between 4900-5100 hours in service
Expansion Valve
Inspect for cleanliness and damage/integrity
500-800
Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
EFFECTIVITY: ALL 21-00-09
Page 6001
FEBRUARY 16, 2010
REPAIR
TASK 21-00-09-30-801
8.0
R-134a AIR CONDITIONING SYSTEM COMPONENT – REPAIR PROCEDURES
SUBTASK 21-00-09-99F-012
8.1
General:
8.1.1
Refer to Illustrated Parts Listing (IPL) for figure/item numbers (Section 11).
WARNING: SERVICE TECHNICIANS ARE ADVISED TO OBSERVE STANDARD SAFETY PRECAUTIONS, SUCH AS WEARING PERSONAL SAFETY GEAR, TO PREVENT INJURY WHILE PERFORMING SERVICE TO THE UNIT.
CAUTION: SERVICE TECHNICIANS MUST PREVENT CONTAMINATION OF INTERNAL SYSTEM PLUMBING DURING ANY SERVICING AND/OR MAINTENANCE OPERATION. THIS INCLUDES NOT ALLOWING THE RECEIVER DRYER TO BE EXPOSED TO ATMOSPHERIC CONDITIONS FOR ANY LENGTH OF TIME. ALL PLUMBING LINES SHOULD REMAIN CAPPED WHENEVER POSSIBLE DURING THE SERVICING OF THE SYSTEM.
CAUTION: RECEIVER DRYER MUST BE REPLACED ANY TIME THE VCS PLUMBING IS OPENED FOR MAINTENANCE. REFER TO DISASSEMBLY (SECTION 5) AND ASSEMBLY (SECTION 9).
SUBTASK 21-00-09-30-001
8.2
Compressor Drive Module repair procedures:
8.2.1
The following components may require periodic repair and/or replacement (refer to the Inspection Schedule in Section 7 for mandatory time intervals) (refer to Figure 10001):
•
Drive Belt (40)/Cover(30)/Pulley (20)
•
Drive Motor/Brushes (10)
•
Compressor Assembly (50)
•
Compressor Shaft Seal
•
Electrical Wiring
Component Maintenance Manual
12037 N Highway 99
Seminole, OK 74868
Phone (405) 382-0731
Fax (405) 382-0737
http://www.enviro-ok.com
EFFECTIVITY: ALL 21-00-09
Page 6002
FEBRUARY 16, 2010
8.2.1.1
DRIVE BELT/COVER/PULLEYS: The drive belt (90) and the associated pulleys will, over time, become worn or damaged, or may simply be out of alignment. It is essential that the drive belt and the pulleys are in excellent condition for proper operation of the Compressor Drive Module assembly. If the drive belt edges are showing signs of wearing or if cracking is noticed, it should be replaced. If the motor drive pulley is showing signs of wearing, both on the pulley teeth and pulley flanges, it should be replaced. If belt cover is cracked or damaged in any way, it should be replaced. If assembly is out of alignment, system will need to be aligned and tensioned. Refer to Disassembly (Section 5) and Assembly (Section 9). Contact Enviro Systems customer service to order new components.
8.2.1.2
DRIVE MOTOR/BRUSHES: The drive motor housing can become damaged over time. If the housing is damaged, the motor should be sent to Enviro Systems for repair (refer to Disassembly, Section 5 and Assembly, Section 9). The drive motor shroud can become damaged over time. It is essential that the shroud remain in excellent condition for the proper operation of the compressor drive module. If the drive motor shroud is damaged, remove and replace (refer to Disassembly, Section 5, and Assembly, Section 9). Drive motor brushes can, over time, become worn or damaged. It is essential that the drive motor brushes remain in excellent condition for proper operation of the Compressor Drive Module assembly. If the brushes show signs of wearing, refer to Testing and Fault Isolation (Section 3) to determine condition of brushes and if they are in need of replacement. If the brushes are measured and are found to be at the minimum length or less, they must be replaced. If the commutator shows signs of pitting, burnt spots, or grooving, the drive motor should be removed and sent to Enviro Systems for overhaul. Refer to Disassembly (Section 5) and Assembly (Section 9). Contact Enviro Systems customer service.
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OPERATING, SERVICING, AND COMPONENT MAINTENANCE MANUAL(17)
