Fujitsu AUXB04GALH Service Manual page 85

Trouble shooting 7
INDOOR UNIT Error Method:
Transmission PCB Connection Error
Detective Actuators:
Indoor unit Controller PCB circuit
Indoor unit Communication PCB
Forecast of Cause :
1. Connection failure
Check Point 1-1 : Reset the power
Does LED error indication reappear?
YES
Check Point 2 : Check Connection
Check if Indoor Communication PCB is removed.
OK
Check Point 3 : Replace Communication PCB
Replace Communication PCB
( If the symptom does not change,
replace Controller PCB and set up the original address.
Indicate or Display:
E16. 1
Outdoor Unit : E.1 4.1, 1 4.2 *
Indoor Unit
Error Code
* Outdoor unit indicates 1 4.1 or 14.2 (No communication from Indoor unit)
Peripheral device indicates 1 6 ( 1 6.4 Error)
Service Tool indicates 14.3 ( Missing Error Indoor unit)
Detective details:
When Parallel communication error (Communication reset occurs continuously
more than specified times) is detected.
2. Outside cause 3. Communication PCB failure
: Operation LED 1 times Flash, Timer LED 6 Times Flash,
Filter LED Continuous Flash.
: 1 6 *
4. Controller PCB failure
NO
Check Point 1-2 : Check outside cause such as noise
Check the complete insulation of the grounding.
Check if there is any equipment that causes harmonic wave near
the power cable (Neon light bulb or any electronic equipment which
causes harmonic wave).
04-15