mine distribution box faqdate：2016-10-26 hot：249
ii. three-phase power light no display1) check the line voltage
2) check the fuse is good
3) check the leds
iii. mutual throw switch does not work
1) check the voltage on both sides of the phase sequence
2) mutual investment switch is in the automatic mode
iv. small leakage circuit breaker on the load side without electricity or residual non-operating
1) check the line supply
2) check the drain attachments are tightened
v. control circuit contactor does not pull
1) check the power
2) check insurance
3) check the external control cable is connected correctly, whether the need for shorting terminals.
4) check whether the thermal overload relay
5) check the contactor coil is damaged
vi. capacitor banks is not a vote of no action
1) check whether the automatic switch status
2) check the sampling signal cable is connected properly
vii. fan class control loop (manual and automatic) does not operate
1) check the power supply is normal
2) check the fuse is normal
3) remote control box connected correctly or loose
4) external control cable connected properly or loose
5) thermal overload relay
6) automatic control external control line connected properly or loose
viii. water pump control box does not work
1) check the power
2) check insurance
3) check the float cable is connected properly
4) thermal overload relay
ix. for contactor closed can not be maintained
1) check the contactor auxiliary point is loose
2) check the contact line is loose connected
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