Gp Tm; Basic Troubleshooting; Start Up And Operation - GE AF-650 GP Design And Installation Manual

Basic Troubleshooting

11 Basic Troubleshooting

11.1 Start Up and Operation

Symptom
Missing input power.
Missing or open fuses or circuit
breaker tripped.
No power to the keypad.
Shortcut on control voltage
(terminal 12 or 50) or at control
terminals.
Display dark/No function
.
Wrong contrast setting.
Display (keypad) is defective.
Internal voltage supply fault or
SMPS is defective.
Overloaded power supply (SMPS)
due to improper control wiring or
a fault within the adjustable
Intermittent display
frequency drive.
TM
AF-650 GP Design and Installation Guide
Possible cause
See Table 3.1.
See open fuses and tripped circuit
breaker in this table for possible
causes.
Check the keypad cable for proper
connection or damage.
Check the 24 V control voltage
supply for terminals 12/13 to 20-39
or 10 V supply for terminals 50 to
55.
Test using a different keypad.
To rule out a problem in the
control wiring, disconnect all
control wiring by removing the
terminal blocks.
DET-767A
Test
Check the input power source.
Follow the recommendations
provided.
Replace the faulty keypad or
connection cable.
Wire the terminals properly.
Press [Status] + [
the contrast.
Replace the faulty keypad or
connection cable.
Contact supplier.
If the display stays lit, then the
problem is in the control wiring.
Check the wiring for shorts or
incorrect connections. If the display
continues to cut out, follow the
procedure for display dark.
Solution
▲ ▼
]/[ ] to adjust
11
11-1
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