Westinghouse WHM24DMA21S Service Manual page 17

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 be charge
refrigerant. Does the
high pressure rise in
heating mode?
NO
If the pressure is close
to static pressure?
yes
4-way valve collude or
compressor exhaust every
ebb.
The pressure on the
high side.
Recharge refrigerant
after air purging with
the vacuum
pump. Is the high
pressure normal over
again?
yes
Air remains at the
refrigerant system.
yes
Recharge refrigerant
NO
Remove the back
panel."see"the
capillary tube1 and
capillary tube2. Is it
defrosting?
yes
The capillary tube is
blocked.Unsolder the
capillary tube ASS'Y. The
capillary tube1 and capillary
tube2 is blown by N .
2
Check heat exchanger and
4-way valve.
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NO