Fujitsu AOYG45LAT8 User Manual page 52

4. Error display
Error display
7 seg. display LED lamp
(blinking)
(example)
Error item
Indeterminable The external or room temperature is outside the oper-
ablerange. The air conditioner will temporarily permit
normal operation, but the Check run should be carried
out again at a later date when the temperatures are
within the operable ranges.
Wiring number The number of wirings between indoor unit and branch
error box is not correct. Turn off all the units, and check
number of connected wires. After correcting the error,
turn on the power and carry out the Check run again.
Pipe number The number of wirings between indoor unit and branch
error box is not correct. Turn off all the units, and check
number of connected wires. After correcting the error,
turn on the power and carry out the Check run again.
If the number of pipes is correct, the internal heat-ex-
changer thermistor or branch box piping thermistor may
have come out of its holder, or a coil may have come
out of an expansion valve. In this case, please contact
Service personnel.
Wiring error A wiring error has occurred.
The location at which the wiring error has been deter-
mined will be displayed 7 seg. display. If there are
multiple wiring error locations, the display will cycle
through the locations. switching every 2 seconds. After
performing the following operation, turn off the power
and correct the wiring.
Note down the content of the wiring error.
Note down the number of blinks of the green LED on
the PCB of the branch box.
(The number of blinks indicates the device number of
the Branch box)
After correcting the wiring, turn on the power and carry
out the Check run again.
(In the case of the diagram)
Connect the connection cable which is connected to the
terminal A of Branch box (Primary) to the terminal B on
Branch box (Secondary 2).
unit error
This is a unit error.
* For error content, please refer to "11.2. Error display
mode".
02-04
( : On, : Blinking,
Contents
1: Branch box-Primary
2: Branch box-Secondary 1
3: Branch box-Secondary 2
a: Branch box-TerminalA
b: Branch box-TerminalB
c: Branch box-TerminalC
: Off)