SiBE811001EB
Outline of Functions (Outdoor unit)
CONVENI-PACK
102
6.2.1 Detailed Description of Functions (Booster Unit)
(1)-1 Startup control
Order of actuator operation when thermostat is ON
The refrigeration SV is activated when an operation permission signal is received from the outdoor unit.
Immediately after startup, when BU_LP < 0.196MPa, it is turned ON, and when BU_LP > 0.294MPa, it is turned
OFF. (Even when BU_LP > 3, after startup finishes it is turned ON.)
After compressor operation, the inverter cooling fan starts up.
Y1E does not open until 15 seconds after the compressor has started up.
For subsequent Y1E operation, refer to “1-(5) Discharge pipe temperature control”.
Frequency is raised 1 step at a time every 15 seconds after the compressor has started up.
Y2E is opened once the compressor has been stepped up 7 times.
(1)-2 Booster unit thermostat ON/OFF conditions
INV. cooling fan
Compressor
Operation permission signal
57Hz
15sec.
63Hz
15sec.
Startup complete
Y2E
Freezing operation output
15sec.
109.5Hz
Y1E
• BU_LP: Low pressure of booster unit
detected with [S1NPL]
Before reception (before
thermostat is ON)
OR
OR
OR
• Booster unit Operation switch: ON
• Compressor re-starting standby terminated
• Freezing thermostat ON signal is ON (X2M(T1, T2 are ON))
• Communication between outdoor unit and booster unit is normal
• When there is a communication error between outdoor unit and the booster unit and when
communication is established even once and the booster unit has permission to operate
• BU_LP > Pressure equivalent target evaporative tempe 0.147MPa
• BU_LP > Pressure equivalent target evaporative temperature
• Previous refrigeration thermostat is ON for at least 5 minutes
• BU_LP > Pressure equivalent target evaporative temperature
• Previous refrigeration thermostat is ON for less than 5 minutes
• Refrigeration standby time is 3-13 minutes or more
• Operation switch: OFF
• Freezing thermostat ON signal is OFF (X2M(T1, T2 are OFF))
• Refrigeration startup complete (At least 60 seconds since compressor startup)
• BU_LP < 0.0147MPa
Thermostat OFF
Compressor for
refrigeration stops
Thermostat ON
Compressor for
refrigeration stops
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