Communication Error Between Outdoor Unit; Noise, Momentary Open, Voltage Drop - Fujitsu Airstage V-II Service Manual

Trouble shooting 14
OUTDOOR UNIT Error Method:
Communication Error Between
Outdoor Unit
Detective Actuators:
Outdoor unit main PCB
Forecast of Cause : 1. Noise, momentary open, voltage drop 2. Power supply defective
3. The number setting mistake of outdoor unit
4. Connection of communication lines between outdoor units defective 5. Main PCB defective
Check Point 1 : Noise, momentary open, voltage drop
Check if temporary voltage drop was not generated.
Check if momentary open was not generated.
Check if ground is connection correctly or there are no related cables near the power line.
OK
Check Point 2 : Check the power supply
Main power ON/OFF state check
Power cable connection, open check
OK
Check Point 3 : Check the number setting of outdoor units
Check the number setting of outdoor units
Number of outdoor unit
1 unit
2 units
3 units
OK
Check Point 4 : Check the connection of communication lines
between outdoor units
T Turn off the power and check.
Connection and open check of communication lines between outdoor units.
OK
Check Point 5 : Replace Main PCB
Change Main PCB and set up the original address.
(Refer to 06-03 page Main PCB removal.)
Indicate or Display:
Outdoor Unit : E. 13. 1
Indoor Unit
Error Code
Detective details:
Master unit: Master unit: State in which "number of connected slave units" by Dip-SW and
Slave unit: State in which communication from the master unit was not
DIP-SW DIP-SW
SET5-1 SET5-2
OFF OFF
OFF ON
ON OFF
: Operation LED 9 times Flash, Timer LED 15 Times Flash,
Filter LED Continuous Flash.
: 13
the number of slave units which can be recognized by
communication did not match continued for 10 seconds or more
after the start of control.
received continued for 10 seconds or more after the start of control.
04-22