Mitsubishi Electric City Multi CMB-WP108V-G, Service Manual

Page: 250 / 301

[
IX
Troubleshooting ]
- 241 - HWE1113B GB
[10] Instructions for the air vent operation
T h is operation removes t h e air t h at remains a f ter water is supplied to t h e water c ir c uit.
Per f orm t h is operation after completion of water- and refrigerant-piping work, air tightness test, evacuation
of refrigerant circuits, and refrigerant charging (and debris removal, if performed).
1.Preparation for the air vent operation
2.Air vent operation
3 . S uppl y water f rom t h e su c tion pipe on t h e HBC c ontroller.
4 . Check that water comes from each air vent valve, and perform the air vent operation.
1. S et DIP S W 4 - 3 f rom O FF to O N.
4 .Close t h e all air vent valves.
3 . S et t h e dipswit ch 4 - 3 f rom O N to O FF.
5 . S top t h e water suppl y .
3.Checking for the presence of residual air
4.End processing
1. S et DIP S W 4 - 5 f rom O FF to O N , and operate t h e water pump.
S et t h e dipswit ch es 5 -1 and 5 -2 to O FF a f ter c ompletion o f air vent operation.
2.I f t h ere is residual air in t h e c ir c uit , it will be nois y . C h e ck f or water lea k s f rom t h e pipe , and t h en , per f orm t h e air
vent operation again.
S tep 1
S tep 2
(1)T
h e operation c an be f or c ed to stop b y setting DIP S W 4 - 4 f rom O FF to O N.
(2)
I f it is f ound during an y step t h at air ventilation h as not been c ompleted to t h e desired degree , go ba ck to S tep 2-1.
(
3
)I
f Error appears on t h e LED , turn o ff t h e brea k er , turn it ba ck on , and start over at S tep 2-1.
T h e operation is per f ormed w h ile air is
dis ch arged f rom t h e water pipe. [ Air1 ]
T h e residual air will be roug h l y removed
b y operating all indoor units. [ Air2 ]
Intermittent operation o f water pump (2 0 min)
O peration o f all indoor units (2 0 min)
S tep 3
S tep 4
T h e residual air will be removed b y operating
indoor units f or ea ch bran ch . [ Air 3]
T h e saturated air in t h e c ir c ulating water will be
removed b y per f orming h eating operation f or all
indoor units and raising t h e temperature o f t h e
c ir c ulating water. [ Air 4 to AirE ]
O peration o f individual indoor unit (1 0 min per one bran ch )
Heating operation o f all indoor units (2 0 min)
Flowchart for air vent operation (DIPSW4-3 is ON.)
2.T h e LED will indi c ate " Air1 " " Air2 " " Air 3" " Air 4" and " AirE " in order over a period o f up to 1 40 minutes , and a f ter 1 40
minutes h ave passed , t h e water pump will stop.
Install a non-return valve to prevent water in t h e water c ir c uit
f looding ba ck to t h e water suppl y pipe , or remove t h e water
suppl y h ose a f ter t h e air vent operation.
LED and DIP S W positions
HBC c ontroller Indoor unit (Example : PEFY-WP-VMA-E)
2.Turn on t h e brea k er , and t h en open t h e air vent valves on t h e HBC c ontroller and t h e indoor units.
Re f er to t h e Installation Manual f or t h e lo c ation o f air vent valves.
(I f t h ere are air vent valves on t h e f ield-installed pipes , open t h e valves as well.)
1. S et DIP S W 5 -1 (valve opening w h en stopped) , DIP S W 5 -2 (nulli f i c ation o f drain over- f low error f or 9 h ours) f rom
o ff to on.