2Ω ssel ro
V6
1 – 31CD
)trohs ro n
epo on( tiucric desol
C
.oN rotcen
noC
95-N
C
lanimret
4
R-LB
1
eulaV lamroN
eulaV lamroN
MPG 5.0
221 naht ssel °
gn
isu F
scitsiretcarahc rots
imreht
1Ω ssel ro
.oN rotce
nnoC
95-NC
1-NC
95-NC
95-NC
14
3
14
15
W-W
W-W
W-W
W-W
13
1
13
14
1. Fan does not begin rotating when hot water is being demanded:
10
20
31
32
14
760
90
99
Possible Causes
PsesuaC elbisso
Psesu
aC elbissotn
iopkcehC
41
.on rotinom ecnanet
niam kcehC
erut
arepmet retaw telni k
cehC
r
o dereggirt si hctiw
s timil hgih fi kcehC
.
detcennoc ylreporp
mi
.ro
tsimreht eht hguorht
ecnatsiser eht kceh
C
.noitce
nnoc reporpmi ro,tiuc
ric trohs ro nepo rof k
cehC
.r
otsim
reht eht hguorht ecn
atsiser eht kcehC
.noitcennoc
reporpmi ro,tiucric tr
ohs ro nepo rof kceh
C
repo
rpmi ro gnitlem rof kce
hC
eciv
ed noitneverp taehrev
o eht fo noitcennoc
.)esuf lamrehT(
dna rell
ortnoc etomer kcehC
draob tiucric
.
.droc
lortnoc etomer fo no
itcennoc kcehC
n
epo ro trohs a rof dro
c lortnoc etomer kce
hC
.tl
uaf dnuorg
a rof ro ,t
iucric
.draob tiucric ecalper ,l
amronba si egatlov fI
.dr
oc eht ecalper ,detcet
ed si tluaf dnuorg a r
o ,tiucr
ic trohs ro nepo
na si ereht fI
Water Flow Sensor Abnormality
.oN rotcen
noC
lanimret
& .oN niP
roloC edo
C
tinU teseR d
na melborP xiF o
t woH
tinU teseR dna
melborP xiF ot woH
lli
w noitsubmoc tub ,tup
ni sag fo ssol a neeb
sah ereht setacid
ni 0
1 gniknilb A
dna detcenn
ocsid eb tsum rewop
eht ,tinu eht teser ot r
edro nI .eunitnoc
then reconnected.
ot desopxe
neeb sah ti ,desuf sah
)esuf lamrehT( ecived noitneverp ta
ehrevo eht fI
273 fo ssecxe
ni s
erutarepmet °F .
e
rusopxe erutarepmet
hgih eht fo esuac eht
xif tsriF
ni eloh(
.)esuf lamr
ehT( ecived noitnev
erp taehrevo eht ecal
per neht dna ).cte ,r
egnahcxe taeh
.draob tiuc
ric eht ecalper ,ytila
mronba egatlov a si
ereht fI
deen lliw draob
tiucric eht ,mumini
m eht
naht rehgih set
acidni rotinom wolf e
ht fI
.decalper
eb ot
nepo ro trohs rof kce
hC .renrub e
ht ni revo
tfel em
alf on si ereht eruS e
kaM
.sniam
er edoc fi timil hgih e
calpeR .no dna ffo r
ewop gninrut yb tinu
t
eseR .tiucric
.85 .sgp no
tsil citsiretcarahc er
utarepmet ot erapmo
C
.noitcennoc r
eporpmi na rof ro
tiu
cric trohs ro nepo rof
kcehC
.85 .sg
p no tsil citsiretcara
hc erutarepmet ot era
pmoC
.noitcen
noc rep
orpmi na rof r
o tiucric trohs ro nep
o rof kcehC
( pmet retaw telni +
)MPG( etaR wolF/7.
53 > K fi KO ° 631 = K ereh
w ,)F ° 721 rof F °F
81 + )C( pmeT t
eS =K ,gnittes erutar
epmet rewol ro ° 7
21 rof F °
.gnittes erom ro F
.scitsiretcarahc
erut
arepmet rotsimr
eht kcehc oslA
.dr
oc lortnoC etomeR e
calper ,stsixe tluaf d
nuorg a ro tiucric tro
hs ro nepo na fI
.spots n
oitsubmoc dna hsalf
lliw edoc rorre eht,d
etceted si noitsubm
oc lamronba fI
n
oitarepo eht no FFO r
etaeh retaw eht gnin
rut yb teser eb nac edoc rorre sihT
.noitsu
bmoc lamronba eh
t f
o esuac eht evomeR
.lenap
yb dee
ps sti desaercni sa
h naf eht fI .94 ,84.oN
rotinom ecnanetnia
m kceh
C
110
=DO- ,S1360-N( %
115
rorre e
ht ,edom nwod tupni
otni egnulp tinu eht
dna )%
,t
nemevorpmi erom d
etseuqer sah naf eht
fI .seunitnoc noitsub
moc tub hsalf lliw ed
oc
.spots noitsubmoc
dna hsalf lliw edoc r
orre eht
,sraey 01
rof esu ni neeb sah
retaeh retaw eht dna
de
yalpsid si
edoc rorre siht fI
.de
calper eb dluohs dn
a elcyc efil sti fo dne
eht dehcaer sah tin
u eht
.n
oitsubmoc lamron
ba rof kcehC
.noitcurtsbo ro egak
colb rof eulf kcehC
.noitsubmoc lamro
nba rof kcehC
.noi
tcurtsbo ro ega
kcolb rof eulf kcehC
A Fuse is Blown
Remote Control Terminal Voltage
Abnormality
Remote Controller Cord Abnormality
Check whether the 10A fuse on the
circuit board is open.
Check voltage supply from circuit board to
remote controller.
Check for open or short circuit
Closed circuit
DC 13 - 16 V
Closed circuit
(not open or shorted)
Remove the cause of excess current, then replace the 10A fuse.
Combustion Abnormality
(Unit continues burning with error code
ashing and drop in heat output)
Combustion Abnormality
(Warning Indication)
(Unit Shuts O)
Combustion Abnormality
Combustion Abnormality
(Unit Shuts O)
Error Descriptions and How to Reset
<NR50-OD / NR66 (-SV,-OD) / N-0531S (-OD), NR71 (-SV,-OD) / N-0631S (-OD)>
<After Pressing the Operation Button on the Remote Controller>
1. If the Priority lamp does not come on:
No
Error Code
Error
Code
Remote Controller Transmission
Abnormality
2. The Priority lamp lights, but an error code appears soon after:
Check for abnormal combustion.
Check ue for blockage or obstruction.
Checkpoint
Pin No. &
Color Code
Overheat Prevention Device (Thermal Fuse)
<During Regular Operation>
Inlet Water Temperature is too high
Error
Code
Error
Code
No
Error
Outlet Thermistor Abnormality
Inlet Thermistor Abnormality
High Limit Switch Triggered
How to Fix Problem and Reset Unit
Pin No. &
Color Code
Normal Value
Checkpoint
62
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