GE AF-600 FP Series, Design And Installation Manual

Page: 98 / 129

10 Basic Troubleshooting
10.1 Start Up and Operation
Symptom Possible Cause Test Solution
Display dark / No function
Missing input power See Table 3.1 . Check the input power source.
Missing or open fuses or circuit
breaker tripped
See open fuses and tripped circuit
breaker in this table for possible
causes.
Follow the recommendations
provided
No power to the keypad Check the keypad cable for proper
connection or damage.
Replace the faulty keypad or
connection cable.
Shortcut on control voltage
(terminal 12 or 50) or at control
terminals
Check the 24 V control voltage
supply for terminal 12/13 to 20–39
or 10 V supply for terminal 50 to
55.
Wire the terminals properly.
Wrong contrast setting
Press [Status] + [
▲
]/[
▼
] to adjust
the contrast.
Display (keypad) is defective Test using a different keypad. Replace the faulty keypad or
connection cable.
Internal voltage supply fault or
SMPS is defective
Contact supplier.
Intermittent display
Overloaded power supply (SMPS)
due to improper control wiring or
a fault within the adjustable
frequency drive.
To rule out a problem in the
control wiring, disconnect all
control wiring by removing the
terminal blocks.
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.
Basic Troubleshooting AF-600 FP Design and Installation Guide
DET-768A 10-1
10 10