Mitsubishi City Multi PURY-P400 Service Handbook page 32

(5) Check points for system structure
Check points from installation work to test run.
Classification Portion
1
Installation
and piping
2
3
4
5
6
7
8
9
Power source
1
wiring
2
3
4
Check item
Instruction for selecting combination of outdoor unit and
indoor unit followed? (Maximum number of indoor units
that can be connected, connecting model name, and
total capacity.) Refer to data book or installation manual.
Are the specifications for refrigerant piping length met?
Piping size connections of branch piping correct?
Branch pipe properly selected?
Refrigerant piping diameter correct?
Refrigerant leak generated at connection?
Insulation work for piping properly done?
Specified amount of refrigerant replenished?
Pitch and insulation work for drain piping properly done?
Specified switch capacity and wiring diameter of main
power source used?
Proper grounding work done on outdoor unit?
The phases of the L line (L1, L2, L3) correct?
L line and N line connected correctly?
–31–
Problem
The unit does not operate.
No cool air (at cooling).
No heat (at heating).
No cool air, no heat, error stop.
Condensation drip in piping.
No cool air, no heat, error stop.
Water leak, condensation drip in
drain piping.
Error stop. The unit does not
operate.
Electric shock.
Error stop. The unit does not
operate.
Some electric parts may be damaged.