Daikin DM80SE, Service Instructions Manual

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SERVICING
31
NOTE: The models use PCBF161 with ID Plug.
1. Check for 120 volts from Line 1 (Hot) to Line 2 (Neutral)
at the ignition control. No voltage, check the door switch
connections and wire harness for continuity.
2. Check for 24 volts from W to C terminal on the ignition
control. No voltage. Check transformer, room thermostat,
and wiring.
If you have 24 volts coming off the transformer but receive
approximately 13 volts on the terminal board between (C)
and (R), check for blown fuse.
3. Check for 120 volts to the induced draft blower by
measuring voltage between Pin 4 & 5 (black & white wire
on 5 pin connector.)
4. If voltage is present in Steps 1 through 3 and the induced
draft blower is operating, check for 120 volts to the ignitor
during the preheat cycle.
5. After the ignitor warmup time, begin checking for 24
volts to the gas valve. Voltage will be present for seven
seconds only if proof of flame has been established.
WARNING
HIGH VOLTAGE
D
ISCONNECT
ALL
POWER BEFORE SERVICING OR
INSTALLING THIS UNIT.
M
ULTIPLE POWER SOURCES MAY
BE PRESENT.
F
AILURE TO DO SO MAY CAUSE PROPERTY
DAMAGE, PERSONAL INJURY OR DEATH.
1. Disconnect the yellow flame sensor wire from the sensor
2. Connect a micro-amp meter in series with this wire and
the sensor terminal.
3. Place the unit into a heating cycle.
L
INE VOLTAGE NOW PRESENT
WARNING
4. As soon as flame is established a micro-amp reading
should be evident once proof of flame (micro-amp
reading) is established, the hot surface ignitor will be
de-energized.
5. The Integrated Ignition controls will have 3-10 uAmps.
1-3 uAmps is considered low and will flash 1 amber light.
Anything below 1 uAmps and the unit will shut down. If the
micro-amp reading is less than the minimum specified,
check for high resistance wiring connections, sensor to
burner gap, dirty flame sensor, or poor grounding.
6. If absolutely no reading, check for continuity on all
components and if good - replace ignition control module.
NOTE: Contaminated fuel or combustion air can create a
nearly invisible coating on the flame sensor. This coating
works as an insulator causing a loss in the flame sense
signal. If this situation occurs the flame sensor must be
cleaned with steel wool.
DM80SN*U
Control Board Main Menu
Description
Main Menu
LED
Display
Option Menu
LED Display
Default
Idle - system awaiting
input
i dl
Display Active Alarm Er r
Display Last 6 Faults L6F
Code Release Number Cr None
Shared Data Revision Sr None
Reset to Factory
Default
r Fd
Yes / No
Outdoor Setting Menu
OdS
AC1 / AC2 / HP1 /
HP2 / OFF OFF
Blower Speed for
Continuous Fan Mode
FSd
F01 - F09 F01
Blower Speed for 1st
Stage Compressor
Mode
AC1
F01 - F09
Model
specific
Blower Speed for 2nd
Stage Compressor
Mode
AC2
F01 - F09
Model
specific
Cooling Fan Off Delay
CFd
0 - 120 seconds
65
seconds
Cooling Fan On Delay
Cnd
0 - 35 seconds
7
seconds
Blower Speed for Gas
Heat Mode
gAF
Allowable speeds Fxx
Model
specific
Gas Heat Off Delay
gFd
30 - 120 seconds
90
seconds
Gas Heat On Delay -
locked
gnd
None
30
seconds
Blower Speed for 1st
Stage HP Heat Mode
HP1
F01 - F09
Model
specific
Blower Speed for 2nd
Stage HP Heat Mode
HP2
F01 - F09
Model
specific
HP Heat Off Delay
HFd
30 - 120 seconds
60
seconds
HP Heat On Delay
Hnd
5 - 30 seconds
5
seconds
See Troubleshooting
chart for alarm code
definition
Control Board Status Menu
LED
Display
Description of System Status
888
All segments illuminated =
control powering up
I DL Idle
FAn Constant Fan
1AC Low Stage Cooling
2AC High Stage Cooling
1AC Compressor Heat, Low Stage
2AC Compressor Heat, High Stage
gH Gas Heat
1HP Low Stage HP
2HP High Stage HP
dFt Defrost