Welcome to Clearwater - Zodiac Pool Care, Inc.

NOTE: If the chlorinator and pump are running, it is normal for a cloud of small bubbles to be produced in the cell, indicating chlorine is being produced.

Water looks clean but no chlorine residual reading.

To test for chlorine residual, switch on the filtration system and adjust the chlorinator to maximum output. After a few hours take a water sample from the pool. Test this water with your test kit. Chlorine residual should measure between 1 and 3 ppm.

• Adjust total alkalinity to 80 - 120 PPM
• Adjust the pH within the range 7.2 - 7.6.
• Make sure your cell is clean.
• Check cyanuric acid levels.
• Increase the setting of the output control.
• Increase the running time of the filter and chlorinator. Make sure that the filter is clean and functioning properly.
• Add salt if indicated by ‘Add Salt’ light.

Use chlorine stabilizer (cyanuric acid) to protect chlorine residual.

This chemical acts as a sun-screen for chlorine and prevents chlorine from being destroyed too quickly by the sun. Chlorine stabilizer is essential to prolong the life of chlorine in the pool water. It should be added following the manufacturer’s instructions to achieve a level of 40 -100 PPM depending on geographical climate. Refer to stabilizer chart on page 19.

Use of algaecides.

Although not normally needed with a Zodiac chlorinator, algaecides may be used. Always follow manufacturer's instructions for treatment. Overdosing the pool with any type of algaecide may reduce residual chlorine measurements/reading. If this occurs, you must manually shock pool water with granular or liquid chlorine until a measurable free chlorine residual reading is obtained.

Pool green and no chlorine reading.

Chlorine is still considered the most effective way of destroying algae and bacteria in your pool water. A chlorine residual of 1 to 3 PPM is considered desirable.

REMEDY:

Superchlorinate or manually shock the pool. This will raise the chlorine residual to a very high level for a short period of time, and reduce chlorine demand.

1. Superchlorinate with a Zodiac chlorinator:
    i) Backwash the filter.
    ii) Adjust the pH to within the range 7.2 - 7.6. See ‘Tips on Water Chemistry’ on pages         20-21.
    iii) Press the button marked ‘Super Chlorinate’. The chlorinator automatically increases         its output and runs for approx. 24 hours of pool pump time.
    iv) After 24 hours, backwash the filter.
    v) Re-adjust the pH to 7.2 - 7.6.
    vi) Check the chlorine reading.
    vii) If the chlorine reading is too low, repeat steps (iii) to (vi) until the chlorine reading is         satisfactory.

2. Manually shock with chlorine or oxidizing agents:
    i) Backwash the filter.
    Ii) Adjust the pH to within the range 7.2 - 7.6 (See ‘Tips on Water Chemistry’ pages         20- 21).
    iii) Add 1 lb. granular chlorine or 1 gallon liquid chlorine or 1 lb. non-chlorine oxidizer per         10,000 gallons of water.
    Iv) After shock dosing, readjust the pH to within the range of 7.2 - 7.6 and check the         chlorine level before using the pool.The chlorine residual should be 1-3ppm..

Chlorine odor

CAUSE

REMEDY

Not enough free chlorine.
Surprisingly, the problem here is not too much chlorine as many imagine. Chloramines form by the bonding of chlorine with amines from sweat and other sources. These chloramines can create a chlorine odor and can also cause eye and skin irritation. Free chlorine does not smell (up to 10 PPM concentration).

Same as problem B.

Slimy walls of pool

CAUSE

REMEDY

Combined algae and bacteria growth.

Brush down the affected walls and follow remedy for Problem B, manually shocking pool.

Eye and/or skin irritation

CAUSE

REMEDY

Incorrect pH.

Adjust the pH to within the range 7.2 - 7.6 (See ‘Tips on Water Chemistry’ pages 20-21).

PROBLEM F Eye and/or skin irritation To clean the deposit (scale) from the cell, see Chlorinator Maintenance section.
CAUSE 1	REMEDY
Incorrect pH and hard water.	Adjust the pH to within the range 7.2 - 7.6 (See ‘Tips on Water Chemistry’ pages 20-21).
CAUSE 2	REMEDY
High total hardness.	Dilute pool with fresh water. Consult your pool professional regarding use of a sequestering agent.

PROBLEM G Chlorine Output will not reach maximum - Add Salt light may also be on
CAUSE 1	REMEDY
Low incoming voltage.	Confirm chlorinator is wired to 220V. If wired to 220V but incoming voltage is less due to location (rural areas for example), raising the salt level will compensate.
CAUSE 2	REMEDY
Salt level below 4000ppm or water temperature is below 65°.	Add salt. (See Salt:When and How to Add it)
CAUSE 3	REMEDY
Cell reversing (self clean).	If the cell is reversing the yellow light on the Chlorine Output indicator will flash. Wait approximately three minutes and the output should return to normal.
CAUSE 4	REMEDY
Cell electrodes may be damaged.	Replace cell. The cell must be replaced with the same model or the chlorinator will not function correctly, call Zodiac for further instructions.

PROBLEM H No Flow light on
CAUSE 1	REMEDY
Insufficient water flow through the cell.	Ensure sufficient water flow through chlorinator cell. Verify that the filter pump is on. Flow may be restricted if the filter needs backwashing. A pocket of air trapped in the top of the cell confirms low water flow through the cell.
CAUSE 2	REMEDY
Sensor disconnected.	Make sure that the sensor lead from the power pack to the cell is attached at the cell (small clip lead).

PROBLEM I Chlorinator stops working, all lights OFF
CAUSE 1	REMEDY
Unit turned off.	Push ON/OFF button. A yellow light in the Chlorine Output indicator window is present when the unit is “ON”.
CAUSE 2	REMEDY
Main power removed or blown fuse.	Check mains power source and fuse. Resetting the Fuse. Turn off all power to the chlorinator powerpack. The resettable fuse is located above the powercord on the bottom rear of the LM2 unit. If the fuse is blown (popped with white area exposed), push to reset. Restore power to unit. Main power supply. Your chlorinator must be connected to a properly grounded electrical power socket, or power source.

PROBLEM J Chlorine level is too high
CAUSE 1	REMEDY 1
Chlorinator is manufacturing too much chlorine.	Use the output button to reduce setting. Retest chlorine daily until proper level is attained.
	REMEDY 2
	Manually turn chlorinator off. The LM Series uses a smart switch that turns the chlorinator on automatically with each pump cycle. If longer periods of zero (0) chlorine output are required, disconnect the blue sensor clip on cell. (Red NO FLOW light will illuminate once chlorine production has stopped.) Sensor clip must be reconnected for chlorine production to begin.

Any type of electrical troubleshooting should be handled by a
qualified pool professional or certified electrician.

Zodiac, Mastering The Elements...
Zodiac Pool Care, Inc.
2620 Commerce Way � Vista, CA 92081-8438
1.800.822.7933 • Email: customerservice@zpc.zodiac.com

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