Communications Troubleshooting Chart - Daikin DV PTC 14 Series Installation Instructions Manual

Communications Troubleshooting Chart

LED LED Status
Off
1 Flash
Red
Communications
LED
2 Flashes
Off
1 Steady
Flash
Green Receive
LED
Rapid
Flashing
On Solid
Indication
● Normal condition ● None
● Communications
● Communications Failure ●
Failure
● Out-of-box reset
● Control power up
● Learn button depressed
● No Power ● No power to air handler
● Communications ● Open fuse
error ● Communications error
● No network found
● Broken/ disconnected
data wire(s)
● Air handler is installed as
a noncommunicating/
traditional system
● Normal network ● Control is "talking" on
traffic network as expected
● Data 1/ Data 2
● Data 1 and data 2 wires
miss-wire reversed at air handler,
thermostat, or
Communicating
compatible outdoor
AC/HP
● Short between data 1
and data 2 wires
● Short between data 1 or
data 2 wires and R
(24VAC) or C (24VAC
common)
Possible Causes Corrective Action(s)
● None
Depress Learn Button
● Verify that bus BIAS
and TERM dipswitches
are in the ON position
● None
● Check fuses and
circuit breakers;
replace/reset
● Replace blown fuse
● Check for shorts in
low voltage wiring in
air handler/system
●
Reset network by
depressing learn
button
● Check data 1/ data 2
voltages
● Check
communications wiring
(data 1/ data 2 wires)
● Check wire
connections at
terminal block
● Verify air handler
installation type
(noncommunicating/
traditional or
communicating)
● Check data 1/ data 2
voltages
● None
● Check
communications wiring
(data 1/ data 2 wires)
● Check wire
connections at
terminal block
● Check data 1/ data 2
voltages
22
Notes & Cautions
● None
● Depress once quickly for
a power-up reset
● Depress and hold for 2
seconds for an out-of-
box reset
● None
● Turn power OFF prior to
repair
● Turn power OFF prior to
repair
● Verify wires at terminal
blocks are securely
twisted together prior to
inserting into terminal
block
● Verify data1 and data
voltages as described
above
● None
● Turn power OFF prior to
repair
● Verify wires at terminal
blocks are securely
twisted together prior to
inserting into terminal
block
● Verify data1 and data
voltages as described
above