V6R VRF 50/60Hz
165
P
art 6 - Diagnosis and T
roubleshooting
4.3
Parameters of Excess and Insufficient Refrigerant System
Under
the
following
conditions,
the
operating
parameters
given
in
Tables
6
‐
4.4
and
6
‐
4.5
should
be
observed:
The
master
outdoor
unit
can
detect
all
the
indoor
units.
The
number
of
indoor
units
displayed
on
DSP2
is
steady
and
is
equal
to
the
actual
number
of
indoor
units
installed.
All
stop
valves
are
open
and
all
indoor
unit
EEVs
are
connected
to
their
unit’s
PCB.
If
the
combination
ratio
is
100%
or
less,
all
the
indoor
units
are
currently
running
and
if
the
combination
ratio
is
more
than
100%,
indoor
units
with
total
capacity
equal
to
the
total
capacity
of
the
outdoor
units
are
currently
running.
If
the
outdoor
ambient
temperature
is
high,
the
system
is
being
run
in
cooling
mode
with
the
following
settings:
temperature
17°C;
fan
speed
high.
If
the
outdoor
ambient
temperature
is
low,
the
system
is
being
run
in
heating
mode
with
the
following
settings:
temperature
30°C;
fan
speed
high.
The
system
has
been
running
normally
for
more
than
30
minutes.
There
parameters
are
more
reliable
in
cooing
only
mode.
Table
6
‐
4.4:
Outdoor
unit
operating
parameters
in
excess
refrigerant
system
Outdoor ambient temperature (T4 )
°C
≥
41
31
to
41
26
to
31
10
to
26
<
10
Discharge pressure (Pc)
MPa
≥
3.5
≥
3.4
≥
2.8
≥
2.6
≥
2.4
Suction superheat (T7-Te)
°C
≤
3
≤
3
≤
3
≤
3
≤
3
Discharge superheat (DSH)
°C
≤
11
≤
15
≤
15
≤
15
≤
17
Table
6
‐
4.5:
Outdoor
unit
operating
parameters
in
insufficient
refrigerant
system
Outdoor ambient temperature (T4 )
°C
≥
41
31
to
41
26
to
31
10
to
26
<
10
Discharge pressure (Pc)
MPa
≤
3.0
≤
2.6
≤
2.4
≤
2.3
≤
2.2
Suction superheat (T7-Te)
°C
≥
18
≥
15
≥
15
≥
12
≥
12
Discharge superheat (DSH)
°C
≥
35
≥
35
≥
30
≥
30
≥
30