Daikin Super Multi Plus E-Series, Service Manual

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Troubleshooting for Outdoor Unit SiEN18-622
388 Troubleshooting
Troubleshooting
∗
2: Voltage measurement point
∗
1: Refer to “Thermistor Resistance / Temperature Characteristics” table on P407.
∗
2: Refer to “Pressure Sensor, Pressure / Voltage Characteristics” table on P409.
(V2 8 19)
YE S
YE S
NO
NO
YE S
YE S
NO
NO
Cooling
NO
NO
YE S
YE S
Caution
Be su re to t u rn off power s witch b efore connect or di s connect connector,
or p a rt s d a m a ge m a y b e occ u rred.
O u t of g as , clo s ing of s top
v a lve or refriger a nt s y s tem
i s clogged. Re qu ire s check
of refriger a nt s y s tem.
Repl a ce m a in o u tdoor u nit
PC b o a rd (A1P).
Repl a ce low pre ssu re s en s or.
O u t of g as or refriger a nt
s y s tem i s clogged. Re qu ire s
check of refriger a nt s y s tem.
Repl a ce the thermi s tor.
Repl a ce the low pre ssu re
s en s or.
Repl a ce the o u tdoor u nit
PC b o a rd (A1P).
The su ction
pipe1 temp. min us low
pre ssu re sa t u r a tion
temp. i s 20 °C or
higher.
I s the
low pre ssu re s en s or
correct?
Re s i s t a nce
i s norm a l when
me asu red with the
thermi s tor (R 3 T) for
su ction pipe1
di s connected from the
o u tdoor u nit
PC b o a rd.
* 1
Low pre ssu re i s
0.25 MP a
or le ss .
The
volt a ge of
X1 8 A pin s (2)
a nd ( 3 ) on m a in
o u tdoor u nit PC b o a rd
(A1P) i s 1.0 VDC or
le ss . (Low pre ssu re
s en s or o u tp u t
volt a ge) * 2
O u tdoor u nit PC b o a rd A1P
+5V
Microcomp u ter
A/D inp u t
* 2 Me asu re volt a ge here.
X1 8 A
Red
Bl a ck
White
Lo
w pre
ssu
re
s
en
s
or
(V2 8 09)
GND