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Mitsubishi Electric PURY-80TMU Service Handbook page 26

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(5) Check points for system structure
Check points from installation work to test run.
Classification
Portion
Installation and
Instruction for selecting combination of outdoor unit,
piping
and indoor unit followed? (Maximum number of indoor
1
units which can be connected, connecting model name,
and total capacity.)
Follow limitation of refrigerant piping length? For example,
2
70m (229ft) or less (total length : 220m (721ft)) at the farthest.
3
Connecting piping size of branch piping correct?
4
Refrigerant piping diameter correct?
5
Refrigerant leak generated at connection?
6
Insulation work for piping properly done?
7
Specified amount of refrigerant replenished?
8
Pitch and insulation work for drain piping properly done?
Power source
Specified switch capacity and wiring diameter of main
1
wiring
power source used?
Proper grounding work done on outdoor unit?
2
The phases of the L line (L1, L2, L3) correct?
3
Check item
–25–
Trouble
Not operate.
Not cool (at cooling).
Not heat (at heating).
Not cool, not heat, error stop.
Condensation drip in piping.
Not cool, not heat, error stop.
Water leak, condensation drip in drain piping.
Error stop, not operate.
Electric shock.
Error stop, not operate.
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