Mitsubishi Electric CITY MULTI PUHY-400YMF-C Service Handbook page 49

In the case of the PUHY-(P) 600·650·700·750 YSMF-C
Check points from installation work to test run.
6
MAIN board
1
Power
source
for
outdoor
unit
2
Classification Portion
1
Installation
and piping
2
3
4
5
6
7
8
1
Power source
wiring
2
3
4
* Limitations apply when 17 or more indoor units are connected. Please refer to the installation manual.
Switch
Switch
1 2 3 4
Check item
Instruction for selecting combination of outdoor unit, and
indoor unit followed? (Maximum number of indoor units
which can be connected, connecting model name, and
total capacity.)
Follow limitation of refrigerant piping length? For ex-
ample, 100 m or less (total length: 220 m) at the farthest.
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 phase of the L line (L ,L
1
L line and N line connected correct?
Outdoor unit
1
1 2 3 4 5
,L ) is correct.
2 3
-46-
1
57
2 46
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.
Error stop, not operate.
Some electric parts will be dameged.
.