O & M Manuals. Dectron Outdoor, Roof Mounted Pool Dehumidification Unit RS-284/324c Outdoor Horizontal Economizer/Dectron Purge® Pool Dehumidification & A/C Unit.

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Owner’s Manual DS/DSV/RS S010-080 Series Dehumidifier Diagnostics - Controller Operation SYMPTOM POSSIBLE CAUSE CHECKS & ACTION Code #9 High limit evaporator. (Over 80°F for 5 minutes) 3. Improperly adjusted or defective hotgas bypass valve (units with A/C only) 4. Excessive air flow 5 Excessive load 6. Improper return-air duct connection at unit (e.g., 90° elbow very close to the unit) Uneven air distribution across the evaporator and bypass damper prevents normal air cooling. • Check to see if line from hot gas bypass valve to distributor is hot. Verify that the three-way valve may be jammed: 1. Force the suspect valve to operate and check for changes in operating temperatures and pressures. If no changes occur, then the valve is completely jammed and must be replaced. 2. If the unit runs fine in pool heating and/or A/C, trips on high pressure in dehumidification mode, and also runs with higher than normal pressures in A/C alone, then the pool heating three-way valve is not shifting completely out of pool heat. (This is assuming that no other cause for a high pressure trip can be found. 3. If the unit runs well in pool heating and A/C, trips on high pressure in dehumidifica tion, and runs higher than normal pressures in pool heat alone, then the A/C three-way valve is not shifting completely out of air conditioning. Replace the defective valve. • Check temperature differential across evaporator. It should be 30° - 35°F @ 80° - 85°F, 50% R/H. • Adjust motor pulley accordingly. • Room temperature is over 90°F / 80% R/H. • To keep the unit running, temporarily remove wires 11 & 12 from the I/O board terminals 11 & 12. Connect a 10k 12k ¼W resistor between terminals 11 & 12. Return wiring to normal as soon as conditions return to normal • Correct improper duct. See Installation section of this manual for proper duct design. Data subject to change without notice. Dectron, Inc. May 2005 93

DS/DSV/RS 010-080 Series Dehumidifier Owner’s Manual Operation Diagnostics - Controller SYMPTOM POSSIBLE CAUSE CHECKS & ACTION Code #9 High-limit evaporator. (Over 80°F for 5 minutes) ..continuation 7. Defective power head on thermal expansion valve 8. Sensor out of calibration 9. Defective chilled-air temperature sensor • Place sensing bulb in cold water, and then warm it up in your hands. A rapid suction line pressure change should occur. If not, power head is defective. • Replace power head if possible. If not, replace valve. Contact Dectron or a Dectron-certified technician. • See Sensor Calibration. Contact Dectron or a Dectron-certified technician. • Order a new sensor. To keep the unit running, temporarily remove wires 11 & 12 from the I/O board terminals 11 & 12. Connect a 10k 12k ¼W resistor between terminals 11 & 12. Replace the sensor as soon as possible. Code #10 Low limit evaporator. (Below 20°F for 3 minutes) 1. Insufficient air flow 2. Insufficient load 3. Improper return-air duct connection at unit, e.g., 90° elbow very close to the unit. Uneven air distribution across the evaporator and bypass damper prevents normal air cooling. • Check temperature differential across evaporator. It should be 30° - 35°F @ 80° - 85°F, 50% R/H. • Adjust motor pulley accordingly. • Room temperature below 75°F and/or below 40% R/H. • Adjust room set points per the CSA/ETL label. • Correct improper duct. See Installation section of this manual for proper duct design. 4. Chilled-air sensor out of calibration 5. My idol app pc download. Chilled-air sensor defective • See Operation - Sensor Calibration. • Order a new sensor. To keep the unit running, temporarily remove wires 11 & 12 from the I/O board terminals 11 & 12. Connect a 10k 12k ¼W resistor between terminals 11 & 12. Replace the sensor as soon as possible. Data subject to change without notice. 94 Dectron, Inc. May 2005

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