Installations Instructions

57
TROUBLESHOOTING CODES
M essag
e
Code
• • • •
Induced draft blower and circulator blower runs continuo usly. No furnace o peratio n. Integrated co ntrol module LED display provides E4 error co de. Co mfo rtNet thermo stat “ Call fo r Service” ico n illuminated. Co mfo rtNet thermo stat scro lls “ Check Furnace” message.
E4
• Flame sensed
when it sho uld no t be present.
IM P R OP
ER
FLAM E
E4 •
• •
Sho rt to gro und in flame sense circuit. Lingering burner flame. Slow clo sing gas valve.
• • •
Correct short at flame sensor or in flame senso r wiring. Check for lingering flame. Verify proper o peration o f gas valve. Replace if necessary.
• Turn po wer OFF prio r to repair.
• • • •
Furnace fails to operate Integrated co ntrol module LED display pro vides EC error co de. Co mfo rtNet thermo stat “ Call fo r Service” ico n illuminated. Co mfo rtNet thermo stat scro lls “ Check Furnace” message.
EC
• Inducer moto r
overcurrent fault.
INDUCE
R FAULT
OR
INDUCE
R
LOCKOU
T
EC •
Lingering Inducer motor o vercurrent detected.
• •
Reset system power and verify inducer is running pro perly. Replace inducer or integrated control module, if necessary.
• •
No furnace operatio n. Integrated co ntrol module LED display provides Ed erro r code.
Ed
• M anual reset
ro llo ut switch is o pen.
ROLLOU
T OPEN
Ed •
• • •
Orifice plate o ut of po sitio n. B locked heat exchanger. B urners out of alignment. Defective heat exchanger.
• • • •
Line up orifice plate. Remo ve B lo ckage from heat exchanger. Line up burners. Check for flame disturbance on roll out when blower comes o n.
• Turn po wer OFF prio r to repair.
• •
No furnace operatio n. Integrated co ntrol module LED display pro vides Ef error co de.
EF
• Open auxiliary
input.
AUXILIA
RY
OP EN
EF •
• •
Open circuit between aux in or aux out. M issing jumper. Open float switch.
• •
Install jumper. Inspect float switch.
• Turn po wer OFF prio r to repair.
• • •
No furnace operatio n. Integrated co ntrol module LED display provides E5 error co de. Co mfo rtNet thermo stat displays “ B attery Power” .
E5
• Open Fuse. No t
Displayed
Not
Displaye
d
• Short in low voltage wiring • Locate and correct sho rt in
low vo ltage wiring.
• •
Turn po wer OFF prior to repair. Replace fuse with 3- amp automotive type
• •
No rmal furnace o peration. Integrated co ntrol module LED display provides E6 error co de.
E6
• Flame sense
micro amp signal is lo w.
WEA K
FLAM E
E6 •
• •
Flame sensor is co ated/o xidized. Flame sensor inco rrectly po sitioned in burner flame. Lazy burner flame due to improper gas pressure or combustion air.
• • • •
Clean flame senso r if coated/o xidized. Inspect fo r proper senso r alignment. Check inlet air piping fo r blockage, proper length, elbows, and term inatio n. Compare current gas pressure to rating plate. A djust as needed.
• • • • •
Turn po wer OFF prior to repair. Clean flame senso r with steel wo o l. See "Vent/Flue Pipe" sectio n for piping details. See rating plate for proper gas pressure.
• • • •
Furnace fails to operate. Integrated co ntrol module LED display provides E7 erro r co de.
ComfortNet
thermostat "Call
fo r Service" ico n illuminated. ComfortNet
thermostat scolls
"Check Furnace" message.
E7
•Problem with
igniter circuit.
IGN IT ER
FAULT
E7 •
• • •
Impro perly co nnected igniter. Sho rted igniter. P o o r unit ground. Igniter relay fault o n integrated contro l module.
• • • •
Check and correct wiring from integrated contro l mo dule to igniter. Replace sho rted igniter. Check and correct unit gro und wiring. Check igniter output from co ntrol. Replace if necessary.
• • •
Turn po wer OFF prior to repair. Replace pressure switch with correct replacement part. Replace control with co rrect replacement part.
Di
agnost
i
c
& Status
LED
Fault
Descriptio
n
Symptoms of Abnormal Operation
(Non-communicating
& ComfortNet™ Thermostat)
ComfortNet
Thermostat Only
P ossible Causes Corrective Actions Notes & Cautions