On board fuse blows
There are 2 fuses mounted on the controller board.
The 2A fuse protects the 5Vdc supply to all the logic on board.
The 4A fuse protects the 24Vdc supply.
If 2A (5V) fuse blows check that the
6V Zener diode
is not short circuited. (return for repairs)
If 4A (24V) fuse blows.
1. Test for fault on 24Vdc circuits (inputs/outputs)
2. Remove all external plugs except 18Vac and 10Vac
3. Replace fuse. If 4A fuse still blows, check that the
30V Zener diode
is not short circuited. (return for
repairs)
4. If fuse does not blow plug in external inputs/outputs one plug at a time and test for external fault.
Testing 24Vdc
Ensure 0V and +24V are free from other voltages. High voltages may be superimposed on 0V and +24V
lines as no reference to ground exists. See Warning 1.2.14
1. Turn the meter to the HIGH AC voltage range.
2. Meter between 0V and Neutral. (Should be 0V)
3. Meter between 0V and L2A (if applicable). (Should be 0V)
4. Meter b24V and Neutral. (Should be 0V)
5. Meter between 0V and +24V. (Should be 24Vdc)
If 24Vdc is low or unstable
, check large capacitor C69 on PCB. This capacitor may have been hit or knocked,
which can break off one of the legs soldered into the PCB. A gentle twist will reveal if one leg has broken. If so,
replace the capacitor
Doors do not open
Check door disable switch DDO on PCB is off
See Inputs-Outputs, DDO
Doors close on park
If the doors close when keyed to park after EDP is opened you may require a software update. Upgrade to latest
Version software.
Doors don’t open at terminal floors
Ensure the MSU slowing input is activated
before
the Top Slowing Limit (TSL) at the top floor
Ensure the MSD slowing input is activated
before
the Bottom Slowing Limit (BSL) at the bottom floor.
Lift gets out of step
If the lift gets out of step check the following.
1.MSU and MSD magnets must be within DZ (DoorZone) at floor level.
2. If lift resets incorrectly at top floor check TOP EEprom setting.
Lift does not answer car calls
Check CMF/CMR setting.
Lift does not answer hall calls
Check UMF/UMR, DMF/DMR setting.
Lift misses hall calls
If the lift misses only some hall calls but answers car calls whilst on normal operation
