Daikin VRV Inverter K Series - Malfunction of Transmission between Outdoor Units

SiE-05C Troubleshooting
Troubleshooting Inverter K Series 153
3.30 Malfunction of Transmission Between Outdoor Units
Remote Controller
Display
UU
UU
77
77
Supposed Causes  Improper connection of transmission wiring between outdoor unit and outdoor unit outside control
adaptor
 Improper cool/heat selection
 Improper cool/heat unified address (outdoor unit, external control adaptor for outdoor unit)
 Defect of outdoor unit PC board (A1P)
 Defect of outdoor unit outside control adaptor
Troubleshooting
(VF056)
NO
YES
Fix the indoor/outdoor unit
transmission wiring.
Replace the outdoor unit PC
Board (A1P).
YES
NO
C/H SELECT is set to "IND".
Cool / heat selection is unified.
C/H SELECT
is set to "MASTER."
NO
Is the indoor
/ outdoor unit transmission
wiring normal?
C/H SELECT
is set to "SLAVE."
YES
NO
Check
and see if the following items
are normal.
NO
Does
a malfunction occur when
the cool / heat selector is set
to "IND?"
YES
Set C/H SELECT to "IND."
The cool / heat unified address for
outdoor units in outdoor - outdoor
unit transmission is duplicated.
Set the address correctly.
YES
NO
NO
YES
YES
Replace the outdoor unit outside
control adaptor. replacement
Replace the outdoor unit PC
board (A1P).
Outdoor unit outside control adaptor
•Is there continuity?
•Does the cool/heat unified address match?
Outdoor unit (unified master unit)
•Is there continuity?
•Does the cool/heat unified address match?
Fix the problem.
SI-05C.BOOK Page 153 Monday, November 6, 2000 4:13 PM
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