Troubleshooting Reference
Manual # 42-02-1P28 A3 5-87
MACHINE ROOM CONSTRUCT (54) Description: The car is on construction operation and machine room
inspection.
System Verifies:- Mode of Operation = Construction MR
Troubleshooting:
Exit construction operation (Set Up for Construction Operation on page 3-
4).
MACHINE ROOM INSPECTION (58) Description: The car is on machine room inspection. Cannot be bypassed.
System Verifies:- Mode of Operation = Inspection MR
If in error, verify position of machine room inspection switch.
MBAB INPUT FAILURE (475) Description: The Bottom Access Bypass Monitor (door close contacts)
(MABB) input monitors proper operation of the solid state devices associ-
ated with bypassing the bottom hoistway door contacts during access oper-
ation.
Troubleshooting: Remove the car from access operation and verify that
test point TP41 (MABB) on the HC-CTL board is low with respect to 1 bus.
MC-CPI-2 (0) IS OFFLINE (219)
MC-CPI-2 (1) IS OFFLINE (220)
MC-CPI-2 (2) IS OFFLINE (221)
MC-CPI-2 (3) IS OFFLINE (222)
MC-CPI-2 (4) IS OFFLINE (804)
MC-CPI-2 (5) IS OFFLINE (805)
MC-CPI-2 (6) IS OFFLINE (806)
MC-CPI-2 (7) IS OFFLINE (807)
Description: The MC-CPI-2 at this ID is offline. Fault-bypassed in Con-
struction.
Troubleshooting:
Verify CPI connections and power.
Verify CPI ID switches correct and fully on or off.
Cycle power to the controller.
Contact MCE; possible defective MC-CPI-2 board.
MDFE FAIL TO ACT (595) Description: The MDFE input monitors the status of the DFE triac and the
DFE triac driver. When either one fails to activate when expected this fault
is generated. When the doors are locked, the 2L bus is high, DSL1 and
DSL2 limits are closed, the down normal limit (DNTD) is closed and the car
is idle, terminals DF and DFE should 120VAC.
Troubleshooting:
1. Check the associated wiring.
2. Check the down fast valve coil.
3. Run the car down on inspection and verify that terminal DFE goes low.
4. The DFE triac may have failed open. Replace the HC-DVR board.
MDFE FAIL TO DEACT (594) Description: The MDFE input monitors the status of the DFE triac and the
DFE triac driver. When either one fails to deactivate when expected this
fault is generated. When the doors are locked, the 2L bus is high, DSL1 and
DSL2 limits are closed, the down normal limit (DNTD) is closed and the car
is idle, terminals DF and DFE should 120VAC.
Troubleshooting:
1. Check the associated wiring.
2. Check the down fast valve coil.
3. The DFE triac may have shorted. Replace the HC-DVR board.
MDFE INPUT IS LOW (489) Description: The input that monitors the continuity of the DN Fast Valve
coil and also checks the off state of the (DFE) triac.
Troubleshooting:
1. Check the termination of the valve coil at terminal DFE on the HC-DVR
board.
2. Check terminal DF for 120VAC with respect to 1 bus.
3. Replace the HC-DVR board.
Table 5.10 Touch Screen Event Listings
Event Description
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