
15.CHECKING COMPONENTS
Test system flow
Cooling mode
Test system pressure.
Is the low pressure
normal at service
part ?
The pressure on the
high side.
The pressure on the
low side.
Recharge refrigerant
after air purging with
the vacuum
pump. Is the low
pressure nomal over
again?
Air remains at the
refrigerant system.
yes
The system needs
refrigerant.The
service people must
add refrigerant. Does
the low pressure
rise ?
NO
Recharge
refrigerant .
yes
The refrigerant system is
blocked. Please check
the Capillary Tube
(or
electronic
expansion valve). Is
it blocked?
Unsolder the capillary tube ASS'Y
(or electronic expansion valve).
The capillary tube1 is blown by N
2
.
Check the check valve
and 4-way valve.
If the pressure is
close to static
pressure?
NO
NO
4-way valve collude or
compressor exhaust very
ebb.
yes
NO
yes
Heating mode
Test system
pressure. Is the high
pressure normal at
service part ?
The pressure on the
high side.
The pressure on the
low side.
Recharge refrigerant
after air purging with
the vacuum
pump. Is the high
pressure normal over
again?
Air remains at the
refrigerant system.
yes
The system needs
refrigerant.The service
people must add
refrigerant. Does the
high pressure rise in
heating mode?
NO
Recharge refrigerant
yes
If the pressure is close
to static pressure?
4-way valve collude or
compressor exhaust every
ebb.
yes
Check heat exchanger and
4-way valve.
NO
The capillary tube is
blocked. Unsolder the
capillary tube ASS'Y.The
capillary tube1 and capillary
tube2 is blown by N
2
.
NO
Remove the back
panel."see"the
capillary tube1 and
capillary tube2. Is it
defrosting?
yes
NO
70
Содержание 2AMW-42U4RRA
Страница 10: ...1 GENERAL Type Capacity Btu h View 1 to 5 indoor units 42K 6 ...
Страница 15: ...3 OUTLINES AND DIMENSIONS 21K AMW3 24U4RFA Unit mm 11 ...
Страница 16: ...3 OUTLINES AND DIMENSIONS AMW3 24U4RAA Unit mm 414 380 12 ...
Страница 17: ...3 OUTLINES AND DIMENSIONS 27K Unit mm 414 380 13 ...
Страница 18: ...3 3 O OU UT TL LI IN NE ES S A AN ND D D DI IM ME EN NS SI IO ON NS S Unit mm 42K 14 ...
Страница 29: ...7 REFRIGERANT CYCLE 7 Refrigerant cycle 12K 14K 18K 21K 24K 25 ...
Страница 32: ...8 WIRING DIAGRAM Electric wiring diagram 1982504 D 21K AMW3 24U4RFA 28 ...
Страница 33: ...8 WIRING DIAGRAM AMW3 24U4RAA Electric wiring diagram 1957327 B 29 ...
Страница 34: ...8 WIRING DIAGRAM 27K 36K 30 ...
Страница 39: ...8 WIRING DIAGRAM Maintenance board Select switch signal to mainboard Communication signal to main board 35 ...
Страница 80: ...Product improvement specifications and appearance in this manual are subject to change without prior notice ...