SiBE811001EB
Outline of Functions (Outdoor unit)
CONVENI-PACK
86
Heating capacity control for air conditioning
• Reduces the number of compressor units on the air conditioning with outdoor evaporator mode at heating.
High pressure ratio avoiding control
• Reduces the number of compressor revolutions when compression ratio > 25 for continuous 10 seconds or more.
(To protect the scroll of the compressor)
Speed reduction with 1 step (for every 30 seconds)
Avoiding control of roll over difference pressure
• Increases the number of compressor revolutions with the pressure difference as physical volume when the
difference between high and low pressure is small (for oil feeding).
Speed increasing with 1 step (for every 30 seconds)
Difference pressure securing control
Prohibited conditions for mode 52 in case of low outdoor air temperature
• Increases the number of compressor revolutions when the difference between high and low pressure is smaller
than 0.294MPa. (for oil feeding)
• When INV._STEP
≥
12: Speed increasing with 3 steps (every 30 seconds)
• Start up STD1 compressor on the refrigeration when INV._STEP < 12 and mode is 30 or 65.
• Operation mode: 41, 42, 43, 46, 64, 65, 70
Increases the number of
compressor units in
outdoor evaporator mode.
Reduces the number of
compressor units at
outdoor evaporator mode.
Maintains the number of
compressor units for the
outdoor evaporator
Mode 52
Mode 43
&
• Operation mode: 40, 43, 46, 47, 52, 59
• HP > 3.038MPa
• Operation mode: 52
• HP > 2.352MPa
OR
&
&
OR
&
• MIN (Tset – Tr) > 2˚C
• MAX (Tset – Tr) > 6˚C
• MIN (Tset – Tr) < 1˚C
• MAX (Tr – 60sec. before Tr) > 0.5˚C
• Operation mode: 40, 43, 46, 47, 52, 59
• SH2 < 5˚C
• HP
≥
2.626~2.891MPa
• LP2 < 0.235~0.304MPa
• MIN (Tset – Tr) > 5˚C
• MAX (Tset – Tr) > 9˚C
&
OR
OR
&
&
HP > 2.35MPa
LP < 0.08MPa
&
• 20 minutes have passed
• LP2 > 0.37MPa
• Except mode 43
OR
• Standby time period of heating capacity
increasing terminated (5 - 30 minutes)
• LP2 < 0.078MPa continues for
consecutive 8 seconds or more
• LP2 < 0.049MPa continues for
consecutive 2 seconds or more
• Number of indoor units with thermostat
ON decreases.
• The following continues for 30 seconds.