Mitsubishi Heavy Industries SRRM40HENG-L, Руководство пользователя

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199
SCM-HG (2 room)
(e) High pressure cut protection control
The high pressure cut protection operates during heating operations when a “heating 0 rps” serial signal is received from one
of the two operating indoor units.
1
When only one of two operating units sends a “heating 0 rps”signal.
2 min.
0 rps
instruction
A room
B room
Indoor unit
instruction
speed
Functional components Operation of each functional components Remarks
Instruction speed from indoor unit
that has “heating 0 rps”.
Instruction speed for indoor unit
that has “other than heating 0 rps”.
Actual operating speed
Outdoor unit fan
4-way valve
EEVA
EEVB
Calculated rps
0 rps
Calculated rps
0 rps
Fully closed
Decision rps
58 pulse or
EEV control
According to
outdoor rps
OFF
ON
OFF
According to
outdoor rps
According to
outdoor rps
Corresponding expansion valve
for unit with serial signal
that has “heating 0 rps”.
Corresponding expansion valve
for unit with serial signal that
has “other than heating 0 rps”.
2
When decision speed becomes 0 rps during high pressure cut protection control
2 min.
200 pulse
200 pulse
2 min.
0 rps instruction
Functional components Operation of each functional components Remarks
The sequence for o rps instruction
shows one example.
Actual operating speed
Outdoor unit fan
4-way valve
EEVA
EEVB
Calculated rps
Calculated rps
0 rps
0 rps
Decision rps
0 rps
According to
outdoor rps
OFF
ON
According to
outdoor rps
Fully closed
According to
outdoor rps
Fully closed
OFF
0 rps instruction
A room
B room
Indoor unit
instruction
speed
2 min. 55 sec.