Servicing & Maintaining Window-Type AC and Domestic Ref Units

ASSESSMENT INSTRUMENT (EVIDENCE PLAN)

Competency HVAC/R NC II
Standard:
Ways in which evidences will be collected:
(tick the column) Questioning/
Interview
The evidence must show that the candidate … Demonstration

*Identified and removed parts/ components of the window X X
type air-conditioning and refrigeration in accordance with
standard procedures X X
*Cleaned parts/components in accordance with standard X X
procedures X X
* Checked and inspected all controls/wiring are as per X X
schematic diagram and in line with SOP X X
* Checked/inspected all parts of the refrigerant circuit as X X
per manufacturer’s manual specifications X X
Checked electrical control for damage in line with X X
standard operating procedures X X
Cleaned the worksite and keeping safe in line with work
instructions
*Demonstrated compliance with safety regulations
applicable to worksite operations
*Selected and used appropriate processes, tools and
equipment to carry out tasks
*Communicated effectively with others where applicable
to ensure safe and effective work operations

*FoIlowed correct servicing and maintenance procedures

Prepared by: Instructor Note: *Critical aspects of competency
Checked by: Supervisor Date:
Date:

Code No. Servicing and Maintaining Window-Type Air- Date: Developed Date: Revised Page #

Conditioning/ Domestic Refrigeration Units 150 of 159

ASSESSMENT INSTRUMENT (DEMONSTRATION)

Candidate’s name:

Assessor’s Name:

Competency Assessment Title: Service and Maintain Window-Type Air-Conditioning/Domestic

Refrigeration Units

Qualification: HVAC/R NC II

Date of Assessment:

Time of Assessment:

Instructions for Demonstration:

Instruction is based on the activity sheet.

Materials and Equipment Tick () to show if evidence is
Air conditioner and a refrigerator demonstrated

OBSERVATION Yes No ACTUAL
1.0 – 3.0 5.0
During the demonstration of skills, did the candidate:

1. Service the electrical control and wiring in accordance
with service procedure? 

2. *Select and use appropriate processes, tools and 
equipment to carry out tasks?

3. *Demonstrate compliance with safety regulations 
applicable to working operations?

4. Observe housekeeping?

5. Observe quality of work?
6. Follow technical specification from manufacturer’s

manual?
7. Observe work safety?

The candidate’s demonstration was:

Competent  Not Competent 

Code No. Servicing and Maintaining Window-Type Air- Date: Developed Date: Revised Page #

Conditioning/ Domestic Refrigeration Units 151 of 159

ASSESSMENT INSTRUMENT (QUESTIONING/INTERVIEW)

Candidate’s name: Service and maintain window type air-conditioning/refrigeration unit
Unit of competency: HVAC/R NC II
Competency standards:

Oral/Interview questions Competent response
Yes No

What are the different types of compressor?

How do you test voltages in the circuit?

How do you test resistance in the circuit?

What instrument is used in measuring AC circuit?

What precautions would you take in analyzing work
instructions?

How would you make yourself safe at all times?
Feedback to candidate:

Acceptable answers are:

1. [insert suggested answers to questions]

Assessor’s signature: Date

Code No. Servicing and Maintaining Window-Type Air- Date: Developed Date: Revised Page #

Conditioning/ Domestic Refrigeration Units 152 of 159

COMPETENCY ASSESSMENT

LO #5 Maintain refrigeration system.

ACTIVITY SHEET: Service refrigerant circuit

Check your mastery of learning outcome 5 by demonstration on how to service refrigerant
circuit.

Given the actual unit:

1. Make a list of tools and materials needed in cleaning the evaporator and condenser
following the format in information sheet 1.

2. Demonstrate on how to test the following:
 Thermometer
 Electronic Leak Detector
 Halide Leak Detector
 Soap Testing Method
 System Analyzer

3. Demonstrate on how to operate the oxy-acetylene welding outfit.

4. Demonstrate the different types of flames.

SELF CHECK:

Check your mastery of learning outcome 5 by completing the questions below. Do not
answer on this test booklet. Get extra piece of paper as your answer sheet.

Enumeration (Explain it briefly):

1. Explain the refrigeration cycle system.

2. Explain the functions of the main component of the system.

3. What is the purpose of vacuuming the system?

4. What is the purpose of condenser?

5. What is the purpose of evaporator?

Code No. Servicing and Maintaining Window-Type Air- Date: Developed Date: Revised Page #

Conditioning/ Domestic Refrigeration Units 153 of 159

ASSESSMENT INSTRUMENT (EVIDENCE PLAN)

Competency HVAC/R NC II
Standard:
Ways in which evidences will be collected:
(tick the column) Questioning/
Interview
The evidence must show that the candidate … Demonstration

*Identified and removed parts/ components of the window X X
type air-conditioning and refrigeration in accordance with
standard procedures X X
*Cleaned parts/components in accordance with standard X X
procedures X X
* Checked and inspected all controls/wiring as per X X
schematic diagram and in line with SOP X X
* Checked/inspected all parts of the refrigerant circuit as X X
per manufacturer’s manual specifications X X
Checked refrigerant circuit for damage in line with X X
standard operating procedures X X
Cleaned the worksite and keeping safe slate in line with
work instructions
*Demonstrated compliance with safety regulations
applicable to worksite operations
*Selected and used appropriate processes, tools and
equipment to carry out tasks
*Communicated effectively with others where applicable
to ensure safe and effective work operations

*FoIlowed correct servicing and maintenance procedures

Prepared by: Instructor Note: *Critical aspects of competency
Checked by: Supervisor Date:
Date:

Code No. Servicing and Maintaining Window-Type Air- Date: Developed Date: Revised Page #

Conditioning/ Domestic Refrigeration Units 154 of 159

ASSESSMENT INSTRUMENT (DEMONSTRATION)

Candidate’s name:

Assessor’s Name:

Competency Assessment Title: Service and Maintain Window-Type Air-Conditioning/Domestic

Refrigeration Units

Qualification: HVAC/R NC II

Date of Assessment:

Time of Assessment:

Instructions for Demonstration:

Instruction is based on the activity sheet.

Materials and Equipment Tick () to show if evidence is
Air conditioner and a refrigerator
demonstrated
OBSERVATION
Yes No ACTUAL
During the demonstration of skills, did the candidate: 1.0 – 3.0 5.0

1. *Identified and removed parts/components of the 
window type air-conditioning and refrigeration in
accordance with standard procedures. 

2. *Select and used appropriate processes, tools and 
equipment to carry out tasks? 

3. *Check/inspect all parts of the refrigerant circuit as per 
manufacturer’s manual specifications. 

4. Observe housekeeping?

5. Observe quality of work?
6. Follow technical specification from manufacturer’s

manual?
7. Observe work safety?

The candidate’s demonstration was:

Competent  Not Competent 

Code No. Servicing and Maintaining Window-Type Air- Date: Developed Date: Revised Page #

Conditioning/ Domestic Refrigeration Units 155 of 159

ASSESSMENT INSTRUMENT (QUESTIONING/INTERVIEW)

Candidate’s name: Service and maintain window type air-conditioning/refrigeration unit
Unit of competency: HVAC/R NC II
Competency standards:

Oral/Interview questions Competent response
Yes No

After vacuuming the system, what will you do to the
system if you want to go home?

Name the main component of the refrigeration system.

What is the importance of vacuuming the system?

What would you do if you do not have a refrigerant
identifier for R-12 refrigerant and what will be your
alternative to identify the refrigerant?
Explain the functions of the main components of the
refrigeration system.
What alternatives would you consider if do if you do not
have an acetylene gas tank to perform brazing?

How would you make yourself safe at all times?

Feedback to candidate:

Acceptable answers are:

1. [insert suggested answers to questions]

Assessor’s signature: Date

Code No. Servicing and Maintaining Window-Type Air- Date: Developed Date: Revised Page #

Conditioning/ Domestic Refrigeration Units 156 of 159

PERFORMANCE TEST

Learner’s Name: Date:

Competency: Service and Maintain Window-Type Air Conditioning/ Test Attempt
Domestic Refrigeration Units 1st 2nd 3rd

Directions: OVERALL EVALUATION

CALL YOUR INSTRUCTOR. Ask Level PERFORMANCE LEVELS
him/her to assess your performance Achieved
in the following critical task and
performance criteria below. 4 – Can perform this skill without supervision and with initiative
and adaptability to problem situations.
You will be rate based on the overall
evaluation on the right side. 3 – Can perform this skill satisfactorily without assistance or
supervision.

2 – Can perform this skill satisfactorily but requires some
assistance and/or supervision.

1 – Can perform parts of this skill satisfactorily, but requires
considerable assistance and/or supervision.

Instructor will initial the level achieved.

PERFORMANCE STANDARDS Yes No N/A
For acceptable achievement, all items should receive a “Yes” or “N/A” response.

1. Identified and classified air filter used in window-type air-conditioning.

2. Air filter is checked for damage and replace if required in line with
standard operating procedures.

3. Air filter is cleaned using appropriate cleaning agent and tool.

4. Air filter is replaced in accordance with standard operating procedures.
5. Proper tools are selected and used in dismantling evaporator and

condensing coils.
6. High-pressure washer is used in cleaning evaporator/ condensing

coils.
7. Cleaning agent or non-corrosive chemical is used in cleaning

evaporator and condensing coils are checked for brake.
8. Fin comb is used in straightening coil fins.
9. Fan motor is checked in line with standard operating procedures.
10. Lubricant is selected according to manufacturer’s specification.
11. Fan motor is lubricated with no spillage in line with standard operating

procedures.
12. Proper electrical tools and test instruments are used in checking power

supply and electrical controls and wiring conditions.
13. All electrical controls, wiring power supply are checked and inspected.
14. Loose connections are other defects are reported.
15. Defective controls and wiring are repaired/replaced in line with

standard operating procedures.
16. All parts of refrigerant circuit are checked as per manufacturer’s

manual/specifications.
17. Refrigerant circuit condition accurately diagnosed and repaired.
18. Completion is reported and recorded.
19. Correct servicing and maintenance procedures are followed.

Code No. Servicing and Maintaining Window-Type Air- Date: Developed Date: Revised Page #

Conditioning/ Domestic Refrigeration Units 157 of 159

Definition of Terms

ELECTRICAL COMPONENTS AND MECHANICAL ACCESSORIES

Blower fan motor - an electrically operated motor which drives the condenser and evaporator
fan.

Compressor motor - is the prime mover of refrigerant pump and heart of the system which
circulate the refrigerant gas to create cycle.

Selector switch - provide the user to operate the air conditioning to different selling such as
fan, low cool , medium cool, or high cool.

Thermostat temperature actuated switch - which will automatically put-off or put on the
compressor operation.

Dual Capacitor - an electrical storage which correct the power factor of the compressor and
blower motor.

Power Supply cord - this will allow the air conditioner to take power from the convenience
outlet so that it is operable by the user.

Air filter - a fine mesh screen installed at the face of evaporator coil which is used to filter dust,
dirt and fumes before it pass across the evaporator coil.

Control panel cover - this protect electrical control assembly of the control panel.

Front grille - holds the filter in place and also provide a neat appearance of the air conditioner
when installed.

Code No. Servicing and Maintaining Window-Type Air- Date: Developed Date: Revised Page #

Conditioning/ Domestic Refrigeration Units 158 of 159