Uh" Malfunction Of System, Refrigerant System Address Undefined - Daikin ERQ Service Manual

ESIE09-05
UH
3.45 " " Malfunction of System, Refrigerant System Address
Undefined
UH
Remote
Controller
Display
Applicable
AII AHU models
Models RXYSQ4~6PA
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Troubleshooting
Improper connection of transmission wiring between outdoor unit and outdoor unit outside
control adaptor
Defect of AHU PC board
Defect of outdoor unit PC board (A1P)
Be sure to turn off power switch before connect or disconnect connector,
Caution
or parts damage may be occurred.
Is
electricity
being introduce for
YES
the first time after
installationor after an AHU
or outdoor unit PC
board has been
replaced?
NO
Is
AHU - outdoor and NO
outdoor - outdoor unit
transmission wiring
normal?
YES
After fixing incorrect wiring,
push and hold the RESET
button on the outdoor unit
PC board for 5 seconds
NO
Does a malfunction occur?
YES
Does
0
NO
a " " malfunction occur
for all AHUs in
the system?
YES
Troubleshooting by Indication on the Remote Controller
Does
a malfunction
occur even after 12
NO
minutes elapses from the
time when electricity is
introduced to AHU
and outdoor
units?
YES
: http://splitoff.ru/tehn-doc.html
Normal
After fixing incorrect wiring,
push and hold the RESET
button on the master outdoor
unit PC board for 5 seconds.
∗ The unit will not run for up to
12 minutes.
Normal
Replace AHU PC board.
Replace outdoor unit PC
board (A1P).
(V2831)
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