Tweco 15XC Merlin - Manual (Page 93)

Manual 0-2251 5-21 CUSTOMER/OPERATOR SERVICE
5.11 TROUBLESHOOTING GUIDE
SYMPTOM POSSIBLE CAUSE REMEDY
A. No front panel LED
indicators lit. Fan and
pump off.
B. AC indicator on. Fan and
pump off.
(Causes 6 and 7 are only
for systems having re-
mote control panel)
1. No primary power. See
also Symptoms C and D
2. Blown fuse (F2)
3. Faulty ON/OFF switch
(SW1)
4. Faulty voltage selection
board
1. No primary power See
also Symptoms C and D
2. Blown fuse (F1 or F2)
3. Faulty ON/OFF switch
(SW1)
4. Faulty voltage selection
board
5. Faulty motor contactor
(MC1 or MC2)
6. Faulty switching control
board (relay K1 not
energized to bypass
remote E-stop function)
7. Remote cable plugged into
J15; remote control panel
not connected on other
end of cable
8. Remote panel E-stop
button activated (or
faulty)
1. Check for proper three-
phase power at input
terminal board
2. Check and replace fuse if
necessary
3. Disconnect primary
power. Check each section
for continuity. Replace
switch if necessary
4. See Sction 5.12-Test A and
replace board if necessary
1. Check for proper three-
phase power at input
terminal board
2. Check and replace fuse if
necessary. See Section
5.12-Test B
3. Disconnect primary
power. Check each section
for continuity. Replace
switch if necessary
4. See Section 5.12-Test A
and replace board if
necessary
5. See Section 5.12-Test C
and replace contactor if
necessary
6. See Section 5.12-Test C,
Step 3
7. Remove cable plug from
J15 or connect remote
panel correctly
8. Twist button clockwise to
release. If necessary, check
for continuity from J37-35
to J37-36