Check Parts Unit - Hitachi RPIL-1.0PNN1DH Service Manual

3. CHECKING COMPONENTS
Heating mode
Test system
pressure. Is the high
pressure normal at
service part ?
The pressure on the
low side.
The system needs
NO
refrigerant. The service
people must add
refrigerant. Does the
high pressure rise in
heating mode?
If the pressure is close
to static pressure?
4-way valve collude or
compressor exhaust every
ebb.

3.2 Check parts unit

1. Indoor unit fan motor
Ducted motor model (DC motor)
1.0HP/1.5HP(9K/12K): SIC-68CVL-F140-1
2.0HP(18K): SIC-68CVL-F160-2
3.0HP(24K): SIC-70CW-F195-1
4.0HP(36K): SIC-101CW-F1250-4
Cassette motor model (DC motor)
1.0/1.5HP(9K/12K):SIC-62FW-D857-15
2.0/3.0HP(18K/24K): EHDS50AQH
4.0HP(36K): SIC-72FW-D8124-2B
The pressure on the
high side.
Recharge refrigerant
after air purging with
the vacuum
pump. Is the high
pressure normal over
again?
Air remains at the
refrigerant system.
yes
NO
Recharge refrigerant
yes
NO
yes
The capillary tube is
blocked.Unsolder the
capillary tube ASS'Y. The
capillary tube1 and capillary
tube2 is blown by N
Check heat exchanger and
4-way valve.
34
Remove the back
panel."see"the
capillary tube1 and
capillary tube2. Is it
defrosting?
yes
NO
.
2