DA Series
Operation Manual
22
When the motor starts up to
△
state, the draining solenoid valves is powered on and the air compressor
begins to load while the pressure of the oil-gas barrel begins to increase after delaying for a while. When
the air pressure increases above the set upper pressure limit (unloading pressure), the draining solenoid
valves are powered off and the air compressor begins to run in empty. Within the specific time (empty
time), if the pressure decreases to the set lower pressure limit (loading pressure), the draining solenoid
valves will be powered on and the air compressor will compress air normally to increase the pressure
within the oil-gas barrel. If the system pressure fails to decrease to the lower pressure limit in empty, the
controller will stop the motor to achieve automatic shutdown for a too long empty. The motor can be
automatically started up as per the startup process only when the pressure decreases to the lower
pressure limit in such a repetitive cycle.
5.5.3 Normal stop:
The draining solenoid valves are powered off by pressing “Stop”. The motor contactor is powered off after
delaying for a while, and then the main motor and the fan motor stop running. The motors can be
restarted only by pressing “Start”.
5.5.4 Frequent startup resistance control
The motor cannot be immediately started up with the motor stopping running for stop by pressing “Stop”,
for a too long empty and a fault. It requires some delay. Under each shutdown state, the time display
window of the controller displays the remaining delay time (such as 199 seconds). The motor can be
started up only when the delay time turns to zero.
5.5.5 Accidental shutdown and emergency shutdown
The controller will immediately shut down the motor when an electrical fault or high-temp exhaust occurs
to the unit. The motor can be restarted up with the fault removed. Press the emergency switch in
emergency.
5.6 Warnings and Prompts
Failure
State display
Indicator light
State of air compressor
Service time of air filter expired
Service life of air
filter
Alarm indicator light of air
filter lit up
Alarm without shutdown
Service time of oil filter expired
Service life of oil filter
Alarm indicator light of oil
filter lit up
Alarm without shutdown
Service time of oil separator
expired
Service life of oil
separator
Alarm indicator light of oil
separator lit up
Alarm without shutdown
Service
time
of
lubricating
grease expired
Filling lubricating oil
in the motor bearings
Alarm without shutdown
