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The display shows the following error codes and warning when a fault is detected, along with an alarm sound. Both the heat and humidity systems shut down, except when specified otherwise.
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NOTICE - |
A humidity error only shuts down the humidity system. If a humidity error occurs, and you want to use the cabinet without humidity, turn the humidity off by following the directions for SP-4, Humidity Setpoint, in Special Programming Section of this manual. Once the setpoint is off, the alarm stops, but the error code shows in display. (Includes “E-12A”, “E-12B”, “E-17”) |
| Display | Cause | Solution |
|---|---|---|
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“E-4 CPU TOO HOT” |
Control board too hot; unit overheating or louvers clogged |
Turn switch to OFF position, then back to ON; if display still shows “E-4”, the PC board is getting too hot; clean louvers and check cooling fan; if cooling fan is not working, have it replaced; once panel cools down, the controls should return to normal; if “E-4” persists, have the PC board replaced |
| “E-5 AIR TEMP TOO HOT” | Faulty relay, PC board, or air probe | Turn switch to OFF position, then back to ON; if display shows “E-5”, the heating circuits and temperature probe should be checked; once the unit cools down, the controls should return to normal; if “E-5” persists, have the PC board replaced |
| “E-6A AIR TEMP SENSOR FAILED OPEN” | Faulty air probe | Turn switch to OFF position, then back to ON; if the display shows “E-6”, the temperature probe should be checked; once the temperature probe is repaired, or replaced, the controls should return to normal; if “E-6” persists, have the PC board replaced |
| "E-6B AIR TEMP SENSOR FAILED SHORTED" | Faulty air temperature probe | Turn switch to OFF position, then back to ON; if the display shows “E-6”, the temperature probe should be checked; once the temperature probe is repaired, or replaced, the controls should return to normal; if “E-6”persists, have PC board replaced |
| "E-12A WATER HEATER SENSOR FAILED OPEN" | Faulty water heater probe | Turn switch to OFF position, then back to ON; if the display shows “E-12A”, the water heater should be checked and repaired or replaced (the water heater probe is built into the water heater); the controls should return to normal; if “E-12A” persists, have PC board replaced |
| "E-12B WATER HEATER SENSOR FAILED CLOSED" | Faulty water heater probe | Turn switch to OFF position, then back to ON; if the display shows “E-12B”, the water heater should be checked and repaired or replaced (the water heater probe is built into the water heater); the controls should return to normal; if “E-12B” persists, have PC board replaced |
| "E-17 HUMIDITY SENSOR FAILED" | Faulty humidity sensor | Turn switch to OFF position, then back to ON; if the display shows “E-17”, the humidity sensor should be checked; once the humidity sensor is repaired, or replaced, the controls should return to normal; if “E- 17” persists, have PC board replaced. See SP-4 to turn humidity OFF until service is provided |
| “E-18 NO WATER, FLOAT SWITCH FAILED” | Float switch stuck or faulty; faulty relay (stuck on);water pan needs cleaned; loose or faulty water heater sensor; acorn nuts on water heater cover loose, or water heater insulation missing or damaged | Turn switch to OFF position, then back to ON; if the display shows “E-18”, check and clean float switch; clean water pan; have relay and water heater sensor checked and replace if necessary; tighten acorn nuts on water heater cover; make sure insulation is under the water heater cover; if “E-18” persists, have PC board replaced |
| "E-41 SYSTEM DATA LOST" | Memory scrambled | Turn switch to OFF position, then back to ON; if the display shows “E-41”, the control should be re-initialized (see Programming Section); if “E-41” persists, have PC board replaced |
| "E-46 DATA SAVE FAILED" | Memory scrambled | Turn switch to OFF position, then back to ON; if the display shows “E-46”, the control should be re-initialized (see Programming Section); if “E-46” persists, have PC board replaced |
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“E-54A CPU TEMP SENSOR OPEN” |
Faulty PC board |
Turn switch to OFF position, then back to ON; if display shows “E-54A”, the control should be re-initialized (see Programming Section); if the error code persists, have PC board replaced |
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“E-54B CPU TEMP SENSOR SHORTED” |
Faulty PC board |
Turn switch to OFF position, then back to ON; if display shows “E-54B”, the control should be re-initialized (see Programming Section); if the error code persists, have PC board replaced |
| “PLEASE DE-LIME needs WATER PAN” | Water pan needs cleaned | Follow the weekly cleaning procedures; this warning will not shut down the heat or humidity; if “PLEASE DE-LIME WATER PAN” persists, have PC board replaced |
| "WATER LEVEL LOW, PLEASE ADD WATER" (Manual fill) | Water pan low on water or empty | Fill water pan, in bottom of unit, to the maximum water fill mark; this warning won’t shut down the heat or humidity |
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"WATER PAN NOT FILLING CHECK WATER SUPPLY" (Auto Fill) |
Water supply turned off |
Turn the water supply valve on |
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Fill solenoid relay bad |
Check solenoid relay |
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Fill solenoid valve bad |
Check solenoid valve |
