Weak current College】 【Mitsubishi common failures and resource collections (3) --- Power By】 【China power house network.

9, test, bad way:
(1) in the control cabinet the power into the Board, usually with a voltmeter, observation of the voltage, if a voltage low and volatile, the item may be imaginary part then.
(2) use the thermometer to test each junction temperature, find out hot sites, polished surface, tighten the screw.
(3) with low voltage and high current test virtual received parts will always power disconnect, and then enters the control cabinet, according to figure 1-2 with a current generator, using temporary 10mm2 copper wire ends of the lap in the contacts, the regulator is gradually step-up, short-circuit current reach 50A, record input voltage values. By the above method on each one are measured at the connection once, record each contact voltage values, then a high voltage, which is bad.
(4) accompanied by soft cable internal broken virtual received test method. When you suspect that a wire between intermittent phenomenon sometimes pass, according to figure 1-2 connection, short-circuit current up to 8A, voltage regulator for positioning, continuous equivalent to 15 times, each time receiving time 2 to 3 minutes, if you find that ampere meter does not start, note the location has been broken test power supply blowing, if the current value unchanged, prove that this line is not broken.

Mitsubishi failures and resource collection

I have a GPS unit--2 lifts capacitance is not charging on recharging .E1 plate lamp is not lit. temperature resistance HL1 burned. may I ask where did find fault .P1 plate normal. switch normal. fault display E7 undervoltage does not start.
Check found: capacitance no fried marks. charging resistance to normal temperature resistance burnt up.
Issue reason: discharge modules.
One SP-VF elevator, has just finished a major repair, replacement of rotary encoder and contactor and wells road parts electrical switches. running an elevator suddenly stop, and then auto-leveling layer, sometimes suddenly stops running, the new transmission once the lift is operating normally, present several times a day like. check emergency stop and lock loop not found exception
Issue reason: coder, I put the original encoder changed after all day without a problem.
One hope elevator, failure, stopped at a tier level; sedan lighting, fans are not; but no layer display outbound, the button does not work well; it is not good in elections; check control cabinet faults appear as "eb" is the cabin serial transmission error failure; can be cut off a 3-5 seconds then the transmission is back to normal. Please each expert guidance, in the end is where there is a problem???
Issue reason: for SBC-C chips, early programs, after the upgrade.
I have a HOPE medical elevator car illumination, lighting relay often sucks, causing this due mainly to the ladder five minutes off lighting always charged, why such problems please advise.
Issue reason: is the car roof is broken, the Board of a Lotus bad! is HOPE of defects
SPVF elevator want to automatically reverse base station function cancel
Solution: put the P1 Panel short wiring J3 disconnected.

Mitsubishi SPVF (MPVF) Elevator typical maintenance analysis
Elevator call failure ...?
The elevator can repair operation, you can auto-leveling, automatically return to the base station. Check all external lines correctly, is p1 onboard Serial lamps stm does not Flash, indicating the serial system does not work properly, the spvf serial system is divided into two branches, one from the engine room to the outbound ladder, a team from the engine room to the directive and the pointed layer, usually the serial system error has many manifestations, single storey error manifested as just that layer cannot call, error 2 floors 2 floors as cannot call between (because the system can transmit sense and bi-directional); there's an error caused the layer staircase light never dies, Elevator automatic response the layer; sedan error performance instructions for each layer are lit, the elevator layers stop; or referring to the layer is not displayed, the floor does not change; these phenomena are serial error. Occurs, the first on the basis of its structure found in either a branch, and then find that a part of good maintenance, the serial system mainly includes p1 Panel 2 interface chips, and some current limiting UPA67C, limiting voltage circuits, each room is fitted with a door box m5690, integrated chip m5226, sedan staircase Board and display Board also m5690, m5226, these are the serial key chip. As long as the replacement will not need to buy a Mitsubishi high Board.

89 relay not action ...?
Elevator Safety loop, external line normal, it is unable to start (89 relay not action, 89 led not lit). First of all, once again confirmed the safety circuit of normal 29, we can't because 29 light would take it that the safety circuit is normal, the safety circuit is the SPVF 79 Terminal through the switch then current limiting direct input P1 plate, so sometimes a low voltage can also enter P1 plate, causing a security loop normal rate, but a lower voltage does not promote 89 relay for action. Therefore safety circuit short-circuit is not very serious, it may not be fire insurance, which is causing this behavior. We can measure safety circuit to ground resistance and safety circuit voltage points. If the safety circuit is normal, we look at the foot of W1C-P09 P1 is output low voltage, because this point P1 plate output easily damaged, if you look at the output transistor p1 plate and alignment, generally find fault.