Check Parts Unit - Pioneer YH1824GHFD18R2 Technical & Service Manual

15.
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?
yes
4-way valve collude or
compressor exhaust every
ebb.

15.2 Check parts unit

1. Outdoor unit fan motor
DC motor
24K: ZWK511A805001
36K/48K/60K: SIC-71FW-F8121-1
2. Compressor
Compressor examination and repairing
24K/ 36K : EATF250D22UMT
48K/60K: EATF400D64UMTA
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
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.
62
Remove the back
panel."see"the
capillary tube1 and
capillary tube2. Is it
defrosting?
yes
NO
.
2