Troubleshooting-Indoor Unit - Daikin DX17VSS B Series Service Instructions Manual

SERVICING
TROUBLESHOOTING-INDOOR UNIT FOR DV*FEC/CAPE(A)*/CHPE*
ACC-OUT
TB5
(Accessory)
ACC-IN
(Accessory)
(Only for
DV*FEC )
FUSE
X3A
EEV
COIL
Auxiliary Alarm Switch (Only for DV*FEC)
the control is equipped with two Auxiliary Alarm terminals,
labeled tB4 and tB5 which are typically utilized in series
with a condensate switch but could also be used with com-
patible Co sensors or fire alarms.
2
the auxiliary alarm switch must be normally closed and
open when the alarm occurs. for example, a normally
closed condensate switch will open when the base pan's
water level reaches a particular level. the control will re-
spond by turning off the blower motor and outdoor unit
and displaying the proper fault codes. if the switch is later
detected closed for 30 seconds, normal operation resumes
and the error message is removed. (the switch is closed
as part of the default factory setting.) the error will be main-
tained in the equipment's fault history. See the right figure
for the connection location.
32
HIGH VOLTAGE !
D ALL
ISCONNECT POWER BEFORE SERVICING
M
ULTIPLE POWER SOURCES MAY BE PRESENT
TO DO SO MAY CAUSE PROPERTY DAMAGE
.
INJURY OR DEATH
AUX ALARM
(Only for DV*FEC )
TB1
TB4 TB2
7seg
SEG2
7seg
SEG1
X5A
X15A
PRESSURE SENSOR THERMISTOR
INDOOR UNIT CONTROL BOARD
WARNING
.
. F
AILURE
,
PERSONAL
C
C C
RX LED
(H3P)
CPU LED STATUS LED
(H2P)
Micro
Processor
TB5
ALARM
TB4
R 2 1
2 2
R R 1 1
X8A
X13A
X12A
SWITCH