81
VAPOR-LOGIC
®
VERSION 6 INSTALLATION AND OPERATION MANUAL
Troubleshooting guide
Table 81-1:
Troubleshooting guide
Power issues
Issue Possible causes Actions
Green power indicator light is off on
Vapor-logic board
• No control voltage • Check for proper supply voltage.
• Transformer secondary circuit breaker tripped • Check for wiring shorts; reset breaker.
No remote indication of alarm light
No remote activation of fan
• Dry contact connection not programmed from
Settings menu
• Go to the programmable outputs section of
Settings menu to program dry contacts.
• Field wiring not installed • Provide field wiring.
• Field-supplied remote fault indicator lamp is burned
out
• Check if at remote indicator light is burned out;
replace if needed.
• Remote fault Vapor-logic dry contact is not
switching
• Check dry contact continuity (Vapor-logic terminal
P12) for contact closure.
No readable information on
touchscreen display
• No power or incorrect voltage to Vapor-logic
board
• Check main power supply.
• Reset control transformer circuit breaker if tripped.
• Reset thermal cutout if tripped.
• Low limit thermostat is not satisfied (outdoor
enclosure only).
• Modular communication cable is disconnected • Connect modular cable.
Touchscreen display does not
energize
• Nonexistent supply voltage to unit • Check main fuse.
• Check main line safety switches.
• Check heater fuses.
• Nonexistent 24 VAC supply to Vapor-logic board • Check for proper supply.
• Verify proper transformer voltage characteristics.
• Verify proper wiring of transformer.
• Check for control circuit voltage, 24 VAC. If
voltage is not present, check transformer circuit
breaker. Reset if needed.
• Nonexistent 21 VDC supply to display • Check 21 VDC voltage supply of the board at
P11. If voltage is low unplug all field wiring to
see if the voltage returns. Incorrect field wiring
on other terminals can draw down the voltage. If
voltage does not return, replace the Vapor-logic
board.
• Check cable from Vapor-logic to display is a
DriSteem supplied cable. Regular phone cables
will fit in the jack but will not allow voltage to the
display.
• Humidifier over-temperature thermostat open • Reset manual switch located above heater below
terminal cover.
Display is completely black
• Touchscreen display is overheated • Cool the touchscreen display.
• Communication cable not connected • Connect cable.
• Defective cable • Replace cable.
• Defective touchscreen display • Replace.
• Defective control board • Contact DriSteem.
Touchscreen does not respond to
touch
• Touchscreen software has locked up • Unplug the communication cable to the display
and re-plug it back in to cycle power.
Continued
TROUBLESHOOTING
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