DC inverter ARV Individual Series technical manual
83
(1) Relay protection of compressor
:
The compressor can start up until the compressor has stopped for 3 minutes.
(2) Equalize the high and low pressure:
The outdoor unit receives the signal of startup, equalize the system pressure before compressor start up.
(3) Interval of the compressor start up
:
In one group
,
the next DC inverter compressor start up 3 seconds later than the compressor start up
before.
3.7.3 Protection and error detection during start up
Effective protection
Compressor restart protection, discharge temp. protection, over current protection, high pressure
protection, phase sequence protection, IPM protection, communication protection, temp. sensor
malfunction protection, over heating protection.
Ineffective protection
Anti-cold protection, low pressure protection, low pressure protection is ineffective during defrosting, oil
reclaim, first 10 minutes after start up.
3.7.4 Stop control discipline
Cooling
、
dehumidify mode
(1)Definition
:
Fshut=48Hz,
When the running frequency of the DC inverter compressor higher than the Fshut, firstly reduce the
frequency lower than Fshut, then come to stop.
(2)Outdoor fan stop 1 minute later.
Heating mode
(1)definition
:
Fshut=48Hz,
When the running frequency of the DC inverter compressor higher than the Fshut, firstly reduce the
frequency lower than Fshut, then come to stop.
(2) Outdoor fan stop 1 minute later.
(3) When the indoor unit OFF, the four way valve still ON.
3.7.5 solenoid valve SV1 control
During the normal operation, SV1 opens when the low pressure lower than 2 bar, the valve closes when
the low pressure more than 2.5 bar in cooling mode , or low pressure more than 3 bar in heating mode.
3.7.6 Crankcase heating control
The ON/OFF status of the crankcase heating is depending on the discharge temp.
3.7.7 Defrosting in heating mode
Starting condition
In heating mode, the outdoor unit detect the temp. (Tdef) of the heat exchanger through defrosting temp.
sensor, and the defrosting control based on the temp. Tdef.
Exiting defrosting
Содержание ANB66FVAMT
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