System Abnormality And Refrigerant System Address Undefined - Daikin LRYEQ16AY1 Service Manual

SiBE811001EB

8.5.24 System Abnormality and Refrigerant System Address Undefined

UH
Error Code
Applicable All indoor models
LCBKQ3AV1
Models
Method of Error Detect an indoor unit with no address setting.
Detection
Error Decision The error decision is made as soon as the abnormality aforementioned is detected.
Conditions
Supposed
Causes
Troubleshooting
Caution Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
Is electricity being introduce
for the first time after
installation or after an
booster or outdoor unit PCB
has been replaced?
NO
Is indoor - outdoor and
outdoor - outdoor unit
transmission wiring
normal? ∗1
YES
Press and hold the RESET button on
the outdoor unit PCB for 5 seconds.
Does an error reoccur?
YES
UH
Does a " " error
occur for all indoor
units in the system?
YES
∗1. Check the correct wiring "indoor-outdoor" and "outdoor-outdoor" by Installation manual.
CONVENI-PACK
Improper connection of transmission wiring between indoor-outdoor units and outdoor-
outdoor units
Defective indoor unit PCB
Defective booster unit PCB
Does an error occur even
after 12 minutes elapses
YES
from the time when
electricity is introduced to
booster and outdoor
NO
NO
NO
LED Indications
First digit
Second digit
NO
units?
YES
Troubleshooting
l h k l h h l
l k h l h l l
Normal
After fixing the incorrect wiring,
press and hold the RESET
button on the master outdoor
unit PCB for 5 seconds.
∗ The unit will not run for up to
12 minutes.
Normal
Replace the booster unit PCB.
Replace the outdoor unit PCB.
284