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Daikin DM80VC User Manual

Daikin DM80VC
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TROUBLESHOOTING
43
Symptoms of Abnormal
Operation (Legacy &
ComfortNet™ Thermostat)
Diagnostic/
Status LED
Codes
Fault Description
ComfortNet™
Thermostat Only
Possible Causes Corrective Actions Notes & Cautions
Message Code
Furnace fails to operate
Integrated control module
LED display provides no
signal.
ComfortNet™ thermostat
“Call for Service” icon
illuminated
ComfortNet™ thermostat
scrolls “Check Furnace”
message
None No 115 power to
furnace or no 24 volt
power to integrated
control module
Blown fuse or circuit
breaker
Integrated control
module has an
internal fault
INTERNAL
FAULT
EE Manual disconnect switch
OFF, door switch open or
24 volt wire improperly
connected or loose
Blown fuse or circuit
breaker
Integrated control module
has an internal fault
Assure 115 and 24
volt power to furnace
and integrated control
module.
Check integrated control
module fuse (3A).
Replace if necessary.
Check for possible
shorts in 115 and 24
volt circuits. Repair as
necessary.
Replace bad integrated
control module.
Turn power OFF prior
to repair.
Replace integrated
control module fuse
with 3A automotive
fuse.
Read precautions
in “Electrostatic
Discharge” section of
manual.
Replace control with
correct replacement
part
LED display indicates On On Normal operation None None Normal operation None Normal operation
Furnace fails to operate
Integrated control module
LED display provides E0
error code.
ComfortNet™ thermostat
“Call for Service” icon
illuminated.
ComfortNet™ thermostat
scrolls “Check Furnace”
message.
E0 Furnace lockout
due to an excessive
number of ignition
“retries” (3 total)
LOCKOUT E0 Failure to establish fame.
Cause may be no gas
to burners, front cover
pressure switch stuck
open, bad igniter or igniter
alignment, improper
orifces, or coated/oxidized
or improperly connected
fame sensor.
Loss of fame after
establishment. Cause
may be interrupted gas
supply, lazy burner fames
(improper gas pressure
or restriction in fue and/
or combustion air piping),
front cover pressure switch
opening, or improper
induced draft blower
performance.
Locate and correct gas
interruption.
Check front cover
pressure switch operation
(hose, wiring, contact
operation). Correct if
necessary.
Replace or realign igniter.
Check fame sense
signal. Sand sensor if
coated and/or oxidized.
Check fue piping for
blockage, proper length,
elbows, and termination.
Verify proper induced
draft blower performance.
Turn power OFF prior
to repair.
Igniter is fragile,
handle with care.
Sand fame sensor
with emery cloth.
See “Vent/Flue Pipe”
section for piping
details.
Furnace fails to operate.
Integrated control module
LED display provides E1
error code.
ComfortNet™ thermostat
“Call for Service” icon
illuminated.
ComfortNet™ thermostat
scrolls “Check Furnace”
message.
E1 Low stage pressure
switch circuit is
closed at start of
heating cycle.
PS1
CLOSED
E1 Low stage pressure switch
contacts sticking.
Shorts in pressure switch
circuit wiring.
Replace low stage
pressure switch.
Repair short in wiring.
Turn power OFF prior
to repair.
Replace pressure
switch with proper
replacement part.
PCBKF103 / PCBKF104 / PCBKF105
P

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Daikin DM80VC Specifications

General IconGeneral
BrandDaikin
ModelDM80VC
CategoryFurnace
LanguageEnglish

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