Daikin FTKS50BVMB, Service Manual

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Troubleshooting for Outdoor Unit SiEN18-622
398 Troubleshooting
7.33 Excessive Number of Indoor Units
Remote Control
Display
UA
Applicable
Models
AII indoor unit models
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes „ Excess of connected indoor units
„ Defect of outdoor unit PCB (A1P)
„
Mismatching of the refrigerant type of indoor and outdoor unit.
„ Setting of outdoor PCB was not conducted after replacing to spare parts PCB.
Troubleshooting
∗
The number of indoor units that can be connected to a single outdoor unit system depends on
the type of outdoor unit.
Caution
(V 3 169)
Norm a l
NO
NO
YE S
YE S
NO
YE S
Doe s a m a lf u nction occ u r?
NO
YE S
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.
I s the o u tdoor PC
b o a rd repl a ced to
s p a re p a rt s PC
b o a rd?
Doe s the
refriger a nt type of
indoor a nd o u tdoor u nit
m a tch?
P us h a nd hold the RE S ET
bu tton on the o u tdoor u nit
PC b o a rd for 5 s econd s .
The tot a l
of indoor u nit s
di s pl a ying “ UA ” a nd
indoor u nit s connected to
the sa me refriger a nt
s y s tem i s within
connect ab le
n u m b er of
u nit *
The refriger a nt cl ass ific a tion
h as not b een s et yet.
There a re too m a ny indoor u nit s
within the sa me refriger a nt
s y s tem.
M a tche s the refriger a nt type of
indoor a nd o u tdoor u nit.
Repl a ce o u tdoor u nit PC b o a rd
(A1P).