Checklist 1
• Using Checklist 1, check that there are no problems with the installation work.
Is the capacity of the
circuit breaker
appropriate?
Outdoor total capacity A Indoor unit A
A
A Header unit (A)
Follower unit (B)
Is the gauge of the
power cable correct?
Indoor unit
Header unit (A) AWG
Follower unit (B) AWG
Is the control
communication line
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 the grand wire constructed certainly?
M
Is the insulating resistance sufficient? (10MΩ or higher)
or higher
V
Is the main power voltage sufficient? (within 208/230V ±10%)
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?
Discharge gas side
Liquid side Balance side
Header unit (A)
Follower unit (B)
− 80 −
Suction gas side
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