Trouble Shooting - Carel SD Installation & Maintenance Manual

Installation & Maintenance Manual

12. Trouble Shooting

The SD 2000 electronic controller contains the most advanced diagnostics available on any electrode humidifier.
Whenever there is an alarm or pre-alarm condition, a cursor appears on the left of the LCD display pointing to
ALARM. If the alarm is a critical alarm, it will appear flashing in the LCD display as an E-- code. Pre-alarms must be
viewed by holding the UP and DOWN keys simultaneously for at least 5 seconds. The pre-alarms, causes and
remedies are as follows:
E01 HIGH CURRENT: When the amperage draw exceeds the first safety threshold.
Causes:
1. Extremely conductive water.
Remedies:
1. Wait to see if the situation corrects itself or evolves to an E06.
2. Contact your local factory representative.
E02 REDUCED OUTPUT: When the unit cannot reach the required output level.
Causes:
1. Low water conductivity.
2. Steam generator near end of its life.
Remedies:
1. Wait to see if the situation corrects itself or evolves to an E08.
2. Replace cylinder. If on startup with new cylinder, add salt or Alka-Seltzer® to the water.
E03 FOAMING OF WATER: When foam reaches the cylinder full probes.
Causes:
1. Softened or contaminated water.
2. Construction dirt in the lines.
3. Back pressure in steam hoses.
Remedies:
1-2. Wait to see if the situation corrects itself. Use unsoftened water. Correct the steam hoses. Flush out
water feed line.
3. Contact your local factory representative.
E05 HIGH WATER LEVEL: When water reaches the cylinder full probes.
Causes:
1. Conductivity of the water is too low.
2. Generator near end of life.
3. Foaming of water.
Remedies:
1. Wait to see if the situation corrects itself or evolves to E08.
E08 GENERATOR SPENT: When steam output remains below required level for too long.
Causes:
1. Electrodes covered with mineral.
2. Startup conductivity below 100 micromhos.
Remedies:
1. Clean or replace generator.
2. If new generator, add salt or Alka-Seltzer® to the water.
Critical Alarms
Critical alarms typically cause a shut down of the humidifier, activation of the red RESET button, activation of the
alarm relay, and display of the alarm's E-- code.
24