SentrySafe SPD 5.5.5 - Manual (Page 54)

Sample Sequencer 
Troubleshooting
TROUBLESHOOTING
Troubleshooting Guide
Symptom Possible Problem(s) Remedy
Display doesn't light Power
Board connection
Fuse on I/O board 1. Verify power supply outputs 6-9 VDC.
2. Verify polarity is connected correctly to I/O
board.
1. Verify I/O board is snugly connected into I/O
board.
2. Verify I/O board component-side is on right
side from rear view.
1. Remove F1 (3A) on the I/O board and test
for continuity. Replace if defective.
Incorrect ANALOG mA Analyzer signal
Polarity 1. Verify the input signal from analyzer is 0-20
mA.
2. Verify the analog signal polarity is correctly
connected to the I/O board terminals (+) and
(-) on J4.
Incorrect valve operates Wiring 1. Verify the interconnected cable (8 conductor)
is correctly connected from the I/O board
terminals and the valve relay board.
Valves don't operate Valve power
Fuse
1. Verify power was brought to the valve relay
board J1 terminals labeled (+) and (-).
Danger: Disconnect power before checking
this!
1. Check F1 fuse on the valve relay board.
Replace with 1A fuse if defective.
SENTRY Equipment Corp • P. O. Box 127 • Oconomowoc, WI 53066 • 262/567-7256 • FAX: 262/567-4523
Web: www.sentry-equip.com • e-mail: [email protected]
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