
MEP 660 - Trouble shooting Manual
Doc No.: IM – 51
Rev.2.0
Print: October 2008
227
PARAMETER
DESCRIPTION
FAULT CODE
1222
FAULT MESSAGE Battery Charging Current Sensor Faulty
RESTRICTIONS
--
ALARM BELL
--
RESET LEVEL
Medium, Manual
If the fault condition is still present when cleared manually, the fault
will be generated again.
FAULT
RECOVERY
Automatic when the BATI battery charging current sensor is detected
normal working.
PROBABLE
CAUSES
1. Battery Charging current sensor BATI faulty.
2. Defective cables
3. Defective ADB1
4. Defective MAIP8_AU card in slot 1.
FAULT
ISOLATION
1. Remove the cable connector at the sensor.
2. Measure voltage between pin B & A of the cable connector. The
voltage should be 24V with pin A positive. (+24V)
3. Measure voltage between pin B & C of the cable connector. The
voltage should be 24V with pin B positive. (-24V)
4. If any of the above voltages (+24V) or (-24V) is zero / less:
A. Remove sensor cable connector on ADB1 with cable ID: AF.
B. Measure voltages between pins A, B and C of the ADB1
connector.
a) If voltage between B & A is less than +24V or voltage
between B & C is less than -24V, ADB1 is defective. Replace
the ADB1.
b) If the voltages between pins B&A is +24V and voltage
between pins B & C is –24V, the interconnecting cable
between ADB and sensor with cable ID: AF is defective.
5. If +24V and –24V supply is available at the sensor cable connector,
A. Sensor may be defective. Replace and check.
B. The 19 pin connectors between ADB1 and MEP-660 control unit
with cable ID: AJ may be slack. Check and tighten the
connectors.
C. The cable with ID: AJ may be defective. Replace the cable and
check up.
D. MAIP8_AU card might be defective. Replace the card and check
up.