
MEP 660 - Trouble shooting Manual
Doc No.: IM – 51
Rev.2.0
Print: October 2008
4
1.0
HIGH PRIORITY FAULTS
PARAMETER
DESCRIPTION
FAULT CODE
1001
FAULT MESSAGE Low Water Level.
RESTRICTIONS
Engine Shutdown
ALARM BELL
Continuous ON
RESET LEVEL
LOW, MANUAL.
After manual reset if the fault still present, the fault will be generated
again.
FAULT
RECOVERY
Automatic when fault is cleared and 20 seconds itime is lapsed.
PROBABLE
CAUSES
1. LWS operated due to low water level.
2. Faulty micro switch, bellow, float. Etc. in the LWS unit.
3. Any open ciduit in LWS wiring from LWS to MEP660.
FAULT
ISOLATION
1. Check Water level. If water is less add water. Reset the fault.
2. If water is full, Check operation of the LWS by operating the LWS
cock.
The number 4 green and yellow LEDs on MDIP-16 card in slot 11
indicate the status of LWS feed back signal.
Both LEDs glow with LWS normal position (full water) and both
LEDs are OFF with LWS operated (low water)
A. If both LEDS are not ON with LWS normal position (full water),
a) Check Voltage at wire No. TO1 on backside TB. Observe for
any disconnected wires. If so reconnect.
b) If voltage at wire No. TO1 is zero
1) Check voltage at wire No. 51 at backside TB. Observe for
any disconnected wires at the terminal. If so reconnect.
2) If voltage is >65V.
i. Either LWS wiring or LWS faulty
Check wiring continuity of wire 51 from backside
TB to LWS.
Check wiring continuity of wire No. TO1 from LWS
to backside TB.
Check for any disconnected wires at LWS.
If wire continuity is good, LWS micro switch is
defective. Replace and check.
c) If the Voltage at back side TB on wire No. TO1 is > 65V
1) Check the wiring continuity of wire No. TO1 from
backside TB to MEP-660 by removing the coupler (DI32-
DI47) - (Pin. E). If no continuity replace the cable.
B. If only Green LED is glowing, and yellow LED is not glowing, it
indicates that the LWS feed back input is available upto digital
input card and the DI card in slot 11 is defective. Replace the
card.