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Checklist 1
Using Checklist 1, check that there are no problems with the installation work.
Is the capacity of the circuit breaker
(Earth leakage breaker) appropriate?
Is the gauge of the
power cable correct?
s I
h t
e
c
o
t n
o r
c l
o
m
m
u
n
c i
t a
o i
Is the power of indoor units supplied collectively?
Is it grounded to earth?
Is the insulation resistance sufficient? (10 M
s I
h t
e
m
a
n i
p
o
w
r e
v
l o
a t
g
e
s
Is the diameter of connecting pipe correct?
Is the branch kit correct?
Is the water drain of the indoor unit arranged so that it flows without accumulation?
Is the heat insulation of pipes sufficient? (connecting pipes, branch kit)
Is there no short circuit of discharge air in the indoor / outdoor units?
After an airtightness test of the pipes, are vacuuming and adding of refrigerant executed?
Are the valves of all the outdoor units fully opened?
n
n i l
e
c
r o
e r
c
? t
r o
h
g i
h
e
) r
f u
c i f
e i
n
? t
(within 380 - 415 V ±10%)
Outdoor unit
Outdoor unit
n I
d
o
r o
o -
u
d t
o
r o
c
o
n
n
e
Central control system connection terminals (U3, U4)
Outdoor unit
49
65
A
Indoor unit
2
mm
Indoor unit
t c
o i
n
t
r e
m
n i
a
s l
(
U
, 1
U
) 2
M
or higher
V
Gas side
A
2
mm
Liquid side
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Table of Contents
Troubleshooting
