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Error Codes: Outdoor Units
ESIE05-03
3–92
Part 3 – Troubleshooting
3
1
3
4
5
3.22
Gas Shortage (Malfunction) (
U0
)
Remote Controller
Display
U0
Method of
Malfunction
Detection
(In test operation)
Detection by closed stop valve.
(In normal operation)
Gas shortage is detected according to the electronic expansion valve opening degree and measured
temperatures and pressures.
Malfunction
Decision
Conditions
(In test operation)
Variations of the indoor unit heat exchange temperature judge whether stop valve is open or closed.
(In cooling operation)
When the electronic expansion valve opens fully and low pressure is below 0.1 MPa continuously for
30 minutes.
(In heating operation)
When the electronic expansion valve opens fully and the suction superheat is large (more than 20°C)
continuously for 30 minutes.
Supposed Causes
P
The stop valve is left in closed.
P
Insufficient refrigerant amount
P
Clogged refrigerant piping system
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Is the
refrigerant amount
appropriate?
Is the stop valve open?
NO
YES
NO
YES
∗
For RZQ71 ~ 140 models, gas shortage alarm is indicated but operation continues.
Open the stop valve.
Collect refrigerant. After vacuum drying is
complete, charge an appropriate amount of
refrigerant.
Check the refrigerant piping system for clogging.
Check 5.9.1
ESIE05-03.book Page 92 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...