Daikin SUPER MULTI NX CTXS07JVJU Service Manual page 266

SiUS12-928_B
 Refrigerant flows from Port A and on. The temperatures of the indoor heat exchanger
Basic Knowledge
 With this function on, freezing (crackling) noise may be heard from the indoor unit. This is not a
 The indoor fan is made to turn on or off at the same time.
Checking the
Those data can be checked by looking at the service monitor LED indicators, when the wiring error
current setting checking is over, during forced operation, at the stop of the system.
The LED indicators stop blinking when the forced operation is over.
data on the
LED1...Room A wiring, LED2...Room B wiring
microcomputer
1st blinking LED...Port A piping, 2nd blinking LED...Port B piping
memory
The 1st blinking LED means the room that is connected with Port A. The 2nd blinking LED means
the one connected with Port B.
Example
Ex: Suppose the LED indicators are blinking as follows.
The above means that Port A is connected with Port B, and Port B with Room A (or self-corrected
this way.)
Trial Operation and Field Settings
thermistors are detected one by one to check up the matching between the piping and wiring.
problem. (This is because the heat exchanger temperature is made to drop below 0°C in order
to increase the detection accuracy.)
L A 1 2 3 4
E
D Green Red
L A 1 2 3 4
E
D
Green Red
A
Wiring
B
A
Piping
B
Wiring Error Check Function
L A 1 2 3 4
E
D Green Red
(R8252)
Wiring
Piping
(R8253)
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