Daikin VRV K - Malfunction of Transmission between Indoor and Outdoor Units in the same System

Troubleshooting Si-95
108 Troubleshooting Inverter K Series
2.32 Malfunction of Transmission Between Indoor and Outdoor Units in the Same
System
Remote Controller
Display
UU
UU
99
99
Supposed Causes ■ Malfunction of transmission between indoor and outdoor of other system
■ Malfunction of electronic expansion valve in indoor unit of other system
■ Defect of PC board of indoor unit in other system
■ Improper connection of transmission wiring between indoor and outdoor unit
Troubleshooting
(VF058)
The "U4"
display blinks on
the remote controllers of other
units within the same
refrigerant
system.
Refer to failure diagnosis for "U5"
malfunction code.
Re-diagnose by display after passage
of 2 minutes or more.
Refer to failure disgnosis for "UA"
malfuntion code.
NO
NO
Refer to failure diagnosis for "U4"
malfunction code.
YES
YES
"U9"
has been displayed for 2
minutes or more.
Turn on all indoor units.
Refer to failure diagnosis for "A1"
malfunction code.
NO
YES
The "A1"
display blinks on
the remote controllers of other
units within the same
refrigerant
system.
The "UA"
display blinks on
the remote controllers of other
units within the same
refrigerant
system.
Refer to failure diagnosis for "A9"
malfunction code.
NO
YES
The "A9"
display blinks on
the remote controllers of other
units within the same
refrigerant
system.
SI-95.BOOK Page 108 Friday, March 31, 2000 10:59 AM