Troubleshooting - IPS Controllers M920 Owner's Manual

M920 & M920W pH/Dual ORP Controller Owner's Manual
V. Troubleshooting
A. pH level too low or Alert Led On
1. pH Set level is too low: Check pH level with test kit and adjust as
necessary.
2. Chemical dose time too high: Lower dose time.
3. Chemical feeder is empty (base): Refill the feeder.
4. Sensor malfunction: Replace sensor.
*Low alkalinity can also cause pH to drift to lower levels. Always target
80-120ppm
B. pH level too high or Alert LED On
1. Sensor tip is dirty: Clean according to maintenance
instructions.
2. Improper pH sensor calibration: Adjust pH calibration.
3. Chemical feeder is empty (Acid): Refill the feeder.
4. Chemical feed pump or squeeze tube malfunction: Repair the feed
pump or replace the squeeze tube. A squeeze tube will last 3-6
months for commercial properties and 6-12 months for residential
properties.
5. Chemical dose time too low: Increase dose time.
*High alkalinity will require more acid than usual to maintain pH levels.
Always target 80-120ppm
C. Chlorine/Bromine level too low or Alert LED On
1. pH should be at your desired set level before addressing any
potential ORP problems.
2. ORP Set level is too low: Check Sanitizer level with test kit and adjust
set Level as necessary
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