31
Test Operation
Checklist 1
Using Checklist 1, check that there are no problems with the installation work.
Is the capacity of the Outdoor total capacity
circuit breaker (Earth
leakage breaker)
appropriate?
A Indoor unit A
A
A
A
Is the gauge of the
power cable correct?
mm²
mm²
mm²
mm²
Indoor unit
Header unit (A)
Follower unit (B)
Follower unit (C)
Header unit (A)
Follower unit (B)
Follower unit (C)
Is the control
communication l
ine
correct?
Indoor-outdoor connection terminals (U1, U2)
Outdoor-outdoor connection terminals (U5, U6)
Central control system connection terminals (U3, U4)
Is the power of indoor units supplied collectively?
Is it grounded to earth?
Is the resistance sufficient? (10MΩ or higher)
Is the main power voltage sufficient? (within 380-415 V ± 10%)
Is the diameter of connecting pipe correct?
Is the branch kit corr
ect?
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?
Gas side Liquid side Bala
nce side
Header unit (A)
Follower unit (B)
Follower unit (C)
V
10MΩ or higher
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