Haier MRV II Instruction Manual page 45

one-way paralleled with outdoor
2
valve EEV leaks, so plenty of
liquid refrigerant enters
one-way valve leaks, then plenty
3
valve
4 EEV
wire is burnt out) , then
four-way valve leakage
four-way
5
valve
in heating mode, the
one-way valve which
gas-liquid segregator
discharging one-way
of refrigerant enters
compressor
in heating mode,
outdoor EEV can not
close fully ( action is
abnormal or wire
sequence is wrong,
plenty of liquid
refrigerant enters
gas-liquid segregator
or in turbulence, then
plenty of refrigerant
enter gas-liquid
segregator
1. Connect the pressure gauge at low
pressure checking joint of slave unit.
low pressure of slave unit should be
the same with master unit basically
2. If the temperature at the back of
one-way valve is low all the time,
there is leakage.
after slave unit stop running( the
other unit still running) , check if there
is leakage
1.connect pressure gauge at the low
pressure checking joint of lave unit.
low pressure of slave unit should be
the same with master unit basically
2. If the temperature at the back of
one-way valve is low all the time,
there is leakage.
1.during slave unit stop running,
check the three ways' temp. of
four-way valve: normally only the
temp. of the way to gas stop valve is
rather high, and temp. of the other two
ways is rather low
2.after slave unit stops running （other
unit still running in heating mode）,
the low pressure should not change,
if the four-way valve in turbulence
then it will go up quickly
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Part 2