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Additional Checks for Troubleshooting
ESIE05-03
3–110
Part 3 – Troubleshooting
3
1
3
4
5
5.8
Evaluation of Abnormal Low Pressure
Abnormally low pressure level is mostly caused by the evaporator side. The following contents are
provided based on field checking of service engineer. Further, the number is listed in the order of
degree of influence.
In cooling operation
In heating operation
Check items (Possible causes)
Judgment
Does the outdoor unit fan run normally?
Visual inspection
Is the indoor unit filter clogged?
Visual inspection
Is there clogging before or after the EV (capil-
lary)?
Check if there is a temperature difference
before and after EV (capillary).
Check if the main valve unit of EV operates (by
noise, vibration).
Is the check valve clogged?
*Heat pump model only
Check if there is a temperature difference
before and after check valve.
→
If YES, the check valve is caught.
Is the LPS normal?
Check continuity using a tester.
Is the indoor unit installed under such conditions
that short circuit easily occurs?
Visual inspection
Is the refrigerant gas short?
Conduct refrigerant collection and vacuum dry-
ing, and then add proper amount refrigerant.
Check items (Possible causes)
Judgment
Does the outdoor unit fan run normally?
Visual inspection
Is the outdoor unit heat exchanger clogged?
Visual inspection
Is the outdoor unit installed under such condi-
tions that short circuit easily occurs?
Visual inspection
Is there clogging before or after the EV (capil-
lary)?
Check if there is a temperature difference
before and after EV (capillary).
Check if the main valve unit of EV operates (by
noise, vibration).
Is the check valve clogged?
Check if there is a temperature difference
before and after check valve.
→
If YES, the check valve is caught.
Is the LPS normal?
Check continuity using a tester.
Is the refrigerant gas short?
Conduct refrigerant collection and vacuum dry-
ing, and then add proper amount refrigerant.
ESIE05-03.book Page 110 Wednesday, April 6, 2005 4:09 PM
Summary of Contents for RZQ100B7W1B
Page 1: ...Service Manual ESIE05 03 RZQ71 125B8V3B RZQ100 140B7W1B Sky Air Inverter R 410A B series...
Page 2: ......
Page 10: ...ESIE05 03 viii Table of Contents 3 1 4 5...
Page 24: ...ESIE05 03 1 2 Part 1 System Outline 3 1 1 5...
Page 32: ...General Outline Outdoor Units ESIE05 03 1 10 Part 1 System Outline 3 1 1 4 5...
Page 42: ...Specifications ESIE05 03 1 20 Part 1 System Outline 3 1 1 4 5...
Page 56: ...Functional Diagrams ESIE05 03 1 34 Part 1 System Outline 3 1 1 4 5...
Page 58: ...ESIE05 03 1 36 Part 1 System Outline...
Page 70: ...Wiring Diagrams ESIE05 03 1 48 Part 1 System Outline 3 1 1 4 5...
Page 84: ...PCB Layout ESIE05 03 1 62 Part 1 System Outline 3 1 1 4 5...
Page 86: ...ESIE05 03 2 2 Part 2 Functional Description 3 1 2 5...
Page 110: ...General Functionality ESIE05 03 2 26 Part 2 Functional Description 3 1 2 4 5...
Page 150: ...ESIE05 03 3 2 Part 3 Troubleshooting 3 1 3 5...
Page 188: ...Troubleshooting ESIE05 03 3 40 Part 3 Troubleshooting 3 1 3 4 5...
Page 264: ...Additional Checks for Troubleshooting ESIE05 03 3 116 Part 3 Troubleshooting 3 1 3 4 5...
Page 266: ...ESIE05 03 4 2 Part 4 Commissioning and Test Run 3 1 4 5...
Page 306: ...ESIE05 03 5 2 Part 5 Disassembly and Maintenance 3 1 5...