66
9.7 FUSE RATING
There are no user replaceable fuses in the power supply. Internal fuses are sized for fault
protection and if a fuse was opened it would indicate that service is required. Fuse replacement
Table 9-2: Internal fuses
Fuse designation
GENH model
F301
F302, F304
F31,F32
20A 250VAC, FAST
2A 400VDC, NORMAL
NOT USED
Check if the positive or
negative load wire is loose.
Output is present momentarily
but shuts off quickly. the display
indicates "OUP".
SYMPTOM
CHECK
ACTION
REF.
3.9.6
3.9.8
Is the power supply
configured to Remote
sense?
Output voltage will not adjust.
Front panel CC LED is on.
Is the unit in constant current
mode?
Check current limit setting
and load current.
5.2.1
5.2.2
Output voltage will not adjust.
Front panel CV LED is on.
Check if output voltage is
adjusted above OVP setting
or below UVL setting.
Set OVP or UVL so they
will not limit the output.
Output current will not adjust.
Front panel CV LED is on.
Is the unit in constant voltage
mode?
Check current limit and
voltage setting.
5.3
5.4
5.2
Check load and sense
wires connection for noise
and impedance effects.
Minimize the drop on the
load wires.
Turn off the AC power
switch. Check load
connections. If analog
programming is used,
check if the OVP is set
lower than the output.
Check rear panel J1
ENABLE connection.
Setup switch SW1 setting.
Check rear panel J1
Output Shut-Off connection.
Check if air intake or
exhaust are blocked.
Check if the unit is
installed adjacent to heat
generating equipment.
Check Foldback setting
and load current.
Connect the sense wires
according to User's
manual instructions.
Turn Off the AC power
and wait until the display
turns off. Turn on the AC
power and press front
panel REM/LOC button.
Is the power supply in remote
sense?
Is the voltage drop on the
load wire high?
Display indicates "ENA"
Display indicates "SO"
Over Voltage Protection
circuit is tripped.
Display indicates "O7P"
Display indicates "Fb"
Are sensing wires
connected properly?
Is the power supply in
Local-Lockout mode?
3.9.4
3.9.8
5.3
5.8
4.4
5.7
5.5
5.12
3.9.8
7.2.5
The front panel controls are
nonfunctional.
Poor Load regulation
Front panel CV LED is on.
No output. Front panel ALARM
LED is blinking.
No output. Display indicates
"OUP"
Large ripple present in output.
67
USER MANUAL INDEX
A
B
C
D
E
F
G
H
ac cables
ac fail
accessories
acknowledge
address
adjustment
auto-restart
back space
baud rate
bipolar voltage
calibration
configuratio
n
checksum
communication
constant current
constant voltage
cooling
cv indicator
cc indicator
daisy-chain
display
enable
error message
external resistor
external voltage
fin
e
foldback
fuse
front panel control
front panel locking
grounding
global output command 55
humidity
hyper terminal
I
J
L
M
O
P
R
S
ID control
initialization
installation
isolated
J1
J2
J3
last setting memory
linking power supplies
line feed
local operation
local sensing
lock front panel
maintenance
otp
outline
over voltage
parallel operation
parity
ps_ok
preview
rack mounting
rear panel
remote sensing
remote/local
registers structure
RS232
RS485
RXD
RX(RS232)
safe start
safety
series operation
shield
specifications
status control
SRQ
shut-off
SW1
T
U
V
W
TXD
TX(RS232)
under voltage limit
volts display
warranty
wire size
8, 15
29
8
51
18, 48
65
38
52
18, 48
40
65
48
51
51, 61
17, 34
17, 34
8, 10
27, 37
27, 37
43, 51
27
33
52
46
45
29
18, 36
66
27
43
24
10
61
52
53
13
62
32, 45, 46
16, 25
49
28, 38
51
51
34
25
43
65
41
51
38
12
27,35
41
61
37, 43
28
13
29
26
28
57
48, 49, 50
48, 49, 50
49, 50
49, 50
38
3
38
49
9, 62
56, 57
57
36
30, 31
49, 50
49, 50
17, 36
27
1, 65
19
Master/Slave
MD
66
Summary of Contents for Genesys GENH6-100
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