Checking And Replacing Fuses - Conair MPA User Manual

This procedure covers the factory-installed fuses on the unit's
motherboard. If you have installed an electrical disconnect or
emergency stop switch, additional fuses and/or breakers may
have been used elsewhere in the in the main power circuit.
To replace a blown fuse:
1
Disconnect and lockout the main power.
2
Open the electrical enclosure door.
on the front panel counterclockwise to open.
3
Replace the fuse.
board and are labeled and identified on the orange shield.
4
Close the electrical enclosure and restart the unit.
If fuses continue to fail:
Verify that the unit is receiving the correct voltage.
Check the voltage, phasing and amperage ratings on
the unit's nameplate.
Verify that the unit's transformer is operating correctly.
Check for proper voltage (120V 10%) to the voltage
sensing device for the fuse location.
Check all wiring referencing the fusing location for
loose connections, damage or improper grounding.
Verify that the correct device is being used for this fuse
D
location. See
M in the M
ONITORS
Fuse 1
Control
power
OFF
1 2 3 4 5 6 7 8
UGH004/0999
The fuses are located on the mother-
E
ISABLING OR NABLING
section.
AINTENANCE
3 PHASE INPUT
F5
UNLDR 1/ VENT 2 SOL
UNLDR 1/ VENT 2 SOL
UNLDR 2/ COOL 1 SOL
UNLDR 2/ COOL 1 SOL
F4
PUMP
PUMP
PUMP OL
PUMP OL
F2
PMP AUX
PMP AUX
1FS/ PURGE/ COMP AUX
1FS/ COMP AUX
PUMPDOWN
8 7 6 5 4 3 2 1
PUMPDOWN
HEAT/COMP
ON HEAT/COMP
CONFIGURATION HTS/COMP OL
DIP SWITCH HTS/COMP OL
F3
ALARM
110V
LLS/PURGE 3SOL
LLS/PURGE 3SOL +
PURGE 4SOL
PURGE 4 SOL +
TCPL'S
SUP RET
1 2 3 4
microKool Portable Chillers
Turn the screw
O
UTPUT
Fuse 5
+
4
Unloader valve 1
3
+
2
1
Fuse 4
4 Unloader valve 2
3
2
1
Fuse 2
Pump
6
5
4
3
2
1
4
3
2
1
Fuse 3
6
N
5 Compressor
C
4
NC
3
NO
2
C
1
4
3
2
1
Fuse 6
F6
Level switch
C
HECKING AND
R
EPLACING
F
USES
WARNING:
Shock Hazard
Only qualified service
personnel familiar with
electrical testing and
industrial equipment
should examine and
correct problems that
require opening the
unit with power on to
diagnose the cause of
a problem.
IMPORTANT:
refer to the wiring dia-
grams that came with
your chiller to locate spe-
cific electrical compo-
nents. Illustrations in the
User Guide are intended
to be representative only.
T
ROUBLESHOOTING
Always
6-13