System Troubleshooting - Daikin DZ16TC0361 Installation Instructions Manual

TROUBLESHOOTING INFORMATION: UNITARY DIAGNOSTIC CODES
S ym pt o m s o f A bno rm a l
O pe ra t io n
( Le ga c y & C o mf o rt N e t ™
T he rm o s t a t )
• Integrated co ntro l mo dule
diagno stic/status LED display
sho ws the indicated co de.
• Heat pump fails to o perate in
heating mo de.
• Integrated co ntro l mo dule
diagno stic/status LED display
sho ws the indicated co de.
• A ir co nditio ner/heat pump
fails to o perate.
• Integrated co ntro l mo dule
diagno stic/status LED display
sho ws the
indicated co de.
• A ir co nditio ner/heat pump
fails to o perate.
• Integrated co ntro l mo dule
diagno stic/status LED display
sho ws the
indicated co de.
• A ir co nditio ner/heat pump
fails to o perate.
• Integrated co ntro l mo dule
diagno stic/status LED display
sho ws the indicated co de.
• A ir co nditio ner/heat
pump o perates at reduced
perfo rmance.
• A ir co nditio ner/heat pump
o perating at lo w stage when
expected to o perate at high
stage.
• Integrated co ntro l mo dule
diagno stic/status LED display
sho ws the indicated co de.

SYSTEM TROUBLESHOOTING

UNITARY DIAGNOSTIC CODES
D ia gno s t ic / S t a t us
LE D D is pla y C o de s
D igit 3 D igit 2 D igit 1
B LA NK A 2
B LA NK A 3
B LA NK E 5
B LA NK E E
B LA NK b 0
B LA NK b 9
F a ult P o s s ible
D e s c ript io n C a us e s
• Outdo o r air temp • Sho rted senso r.
senso r fault • Open senso r.
• Senso r
disco nnected.
• Senso r o ut o f
range.
• Outdo o r co il • Sho rted senso r
temp senso r fault • Open senso r.
• Senso r.
disco nnected.
• Senso r o ut o f
range.
• Open fuse • Sho rt in lo w vo ltage
wiring.
• B o ard mis- • Co mpresso r relay
o peratio n co ntacts welded.
• Circulato r • Indo o r bIo wer
blo wer mo to r is mo to r pro blem.
no t running when it • Co mmunicatio ns
sho uld be running. erro r between
indo o r and o utdo o r
unit.
• A ir flo w is lo wer • Indo o r bIo wer
than demanded mo to r pro blem
• B lo cked filters .
• Restrictive/
undersized ductwo rk
• Indo o r/ o utdo o r
unit miss-match.
14
C o rre c t iv e N o t e s &
A c t io ns C a ut io ns
• Check senso r • Turn po wer OFF prio r to
co nnectio n. repair.
• Replace o pen/ • Replace with co rrect
sho rted senso r. replacement part.
• Check senso r • Turn po wer OFF prio r to
co nnectio n. repair.
• Replace o pen/ • Replace with co rrect
sho rted senso r. replacement part.
• Lo cate and co rrect • Turn po wer OFF prio r to
sho rt in lo w vo ltage repair.
wiring. • Replace fuse with
3-amp auto mo tive type.
• Replace co ntro l. • Turn po wer OFF prio r to
repair
• Replace with co rrect
replacement part.
• Check indo o r • Turn po wer OFF prio r to
bIo wer mo to r. repair.
• Check indo o r • Replace with co rrect
bIo wer mo to r wiring. replacement part.
• Check indo o r unit
co ntro l.
• Repair/ replace any
faulty wiring.
• Repair/ replace
indo o r bIo wer mo to r
o r co ntro l.
• Check indo o r • Turn po wer OFF prio r to
blo wer mo to r. repair.
• Check Filters • Replace with co rrect
clean/replace as replacement part. See speci
needed. catio n sheet s fo r air o w re
• Check ductwo rk, uirements and ma imum e
resize as needed. ter nal static pressure.
• Verify indo o r and • See specificatio n sheets
o utdo o r units are fo r appro ved
pro perly matched. system matches.