Daikin VRV EMERION RXYQ-AATJA, Service Manual

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Troubleshooting by Error Code SiUS342303E
369 Part 6 Service Diagnosis
3.74 Climate Talk Communication System Combination Error
(Before Initial Setting for Communication Completes)
Applicable
Models
CXTQ-TA
Error Code
UH-05
Method of Error
Detection
Detects the type of the devices constituted in Climate Talk Communication.
Error Decision
Conditions
The error decision is made when any of the following conditions is established before elapsing 4
minutes after the power is turned ON.
 Two or more gas furnaces are detected.
 Any unit other than the gas furnace is detected.
 The initial setting for communication does not complete.
Supposed
Causes
 Connection of wrong devices
 The power of the gas furnace is not turned ON, or the power of the gas furnace is turned ON
after a certain period of time has been elapsed after the power of the CXTQ-TA was turned ON.
 Disconnection of the communication wire between the CXTQ-TA and the gas furnace
 Two or more gas furnaces are connected to one CXTQ-TA.
 No gas furnace is connected.
Troubleshooting
YES
Caution
Be sure to turn off the po w er s w itch before connecting or disconnecting
connectors, or parts may be damaged.
The gas
furnace and the
CXTQ-TA are turned O N
at the same
time.
YES
YES
N O
N O
N O
1 and 2
terminals of the
gas furnace and the
CXTQ-TA are
connected each
other.
Replace the CXTQ-TA PCB
or the gas furnace PCB.
Turn O N the gas furnace
and the CXTQ-TA at the
same time.
Connect the gas furnace of
proper combination. Do not
connect any other devices.
Ensure correct w iring of the
communication w ire
bet w een terminals.
Any
device other
than the gas
furnace of proper
combination is connected
to 1 and 2
terminals of
X 8 A.