ESIE05-03
Error Codes: System Malfunctions
Part 3 – Troubleshooting
3–99
3
3
4
5
1
4.4
Malfunction of Transmission between MAIN Remote Controller
and SUB Remote Controller (
U8
)
Error code
U8
Error generation
The error is generated when, in case of controlling with two remote controllers, the microprocessor
detects that the transmission between the indoor unit and the remote controllers (MAIN and SUB) is
not normal over a certain amount of time.
Causes
The possible causes are:
P
Transmission error between MAIN remote controller and SUB remote controller
P
Connection among SUB remote controllers
P
Malfunctioning remote controller PCB.
Troubleshooting
Caution
Be sure to turn off power switch before connect or disconnect connector, or parts damage may be
occurred.
Turn the SS-1 switch of one
remote controller to MAIN.
Turn OFF the power supply,
and restart operation.
Turn OFF the power once and
restart operation.
Replace remote controller PCB
if any error is generated.
Turn the SS-1switch of one
remote controller to MAIN.
Turn OFF the power supply,
and restart operation.
Replace the remote controller
wiring.
Controlling
with 2-remote
controller
Both SS-1
switches on remote
controllers are turned
to SUB
Is there
continuity in remote
controller wiring?
SS-1
switch on remote
controller PCB is turned
to MAIN
NO
NO
YES
NO
YES
YES
YES
NO
ESIE05-03.book Page 99 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...