Fujitsu R407C User Manual

ERROR
CONTENTS
ERROR CAUSE
COUNTERMEASURE
Transmission
error
1F
2. Check if communication line is
connected to all indoor units.
Check if communication line is
disconnected.
3. Check indoor units power supply.
4. Check the insertion of indoor unit
communication PC board and outdoor
unit communication PC board.
5. 1) If transmission error occurs after
Parallel communication error
replace PC boards with following
procedures and check the operation.
(1) Replace outdoor unit communication
printed circuit board.
(2) Replace outdoor unit control printed
circuit board.
2) when some indoor units in same
refrigerant system are operated,
replace printed circuit boards with
following procedures and make sure
the operation.
(1) Replace communication printed
circuit board of indoor unit that occurs
transmission error
(2) Replace control printed circuit board
of indoor unit that occurs transmission
error.
3) When an error occurs on all indoor
units of the same refrigerant system
and compressor does not operate,
replace PC boards with following
procedures and make sure the
operation.
(1) Replace outdoor unit communication
PC board.
(2) Replace outdoor unit control PC
board.
(3) Replace indoor unit communication
PC board.
(4) Replace indoor unit control PC board.
5. PC board is faulty.
1. Error occurrence condition
Communication from each
indoor units are cut off for a
certain time.
2. Relevant operation
1) If transmission error occurs
after 90 seconds since
Outdoor unit circuit board
error 1 occurs, all
compressors are stopped
and error is displayed on
LED of outdoor unit.
2) If communication from all
indoor units are cuts of for a
certain time, all
compressors are stopped
and error is displayed on
LED of outdoor unit.
3) Except a forementioned
operations, only indoor units
that completes the
commnunications are
operated. Error is displayed
on LED of outdoor unit.
3. Clearance
1) Communication with indoor
units is recovered.
2) Main power is reset.
1. Effect of extraneous noise
2. Communication line is not
connected, contact is faulty,
or disconnection.
3. Indoor unit power is OFF
4. Insertion fault for
communication printed circuit
board of indoor unit or
outdoor unit.
1. When power is turned off, and turned
on again:
(1) If error doesn't occur, printed circuit
board is normal. Then, remove noise
sources near outdoor unit.
(2) If error occurs again, remove noise
sources and take measures with the
following countermeasure No.2 to 5.
ERROR
CODE
05-21

Fujitsu R407C Specifications

General

Brand	Fujitsu
Model	R407C
Category	Air Conditioner
Language	English