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ESIE05-03
Error Codes: Outdoor Units
Part 3 – Troubleshooting
3–61
3
3
4
5
1
3.4
Actuation of Low Pressure Sensor: RZQ71B8V3B (
E4
)
Remote Controller
Display
E4
Method of
Malfunction
Detection
Actual value of the low pressure is continuously measured using the low pressure sensor.
Malfunction
Decision
Conditions
Error is generated when the low pressure is dropped under specific pressure.
Supposed Causes
P
Abnormal drop of low pressure (Lower than 0.15MPa)
P
Defect of low pressure sensor
P
Defect of outdoor unit PC board
P
Stop valve is not opened.
Troubleshooting
*1: Voltage measurement point
Low
pressure at stop
due to malfunction is
0.15 MPa.
Measure
the voltage (VL)
of X64A pin No. (2) - (3)
of outdoor PC board (A1P).
∗
1
Is the relationship between
low voltage and VL
normal?
Is stop
valve opened?
Out of gas, refrigerant system
clogging, wiring and piping wrong
connection, stop valve closed,
electronic expantion valve fully close
malfunction.
Replace the low pressure sensor.
Replace outdoor unit PC board A1P.
NO
NO
YES
YES
Open stop valve.
NO
YES
ESIE05-03.book Page 61 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...