5
Operation (continued)
SAFETY SWITCH
The safety switch is designed to activate an alarm or to cut off power in the event of high water in the condensate reservoir.
To control a thermostatic circuit the COM and NO connections from the safety switch are to be wired in series with the low
voltage thermostat circuit to shut down the heating/AC circuit. The COM and NC switch contacts may be used to actuate a
low voltage alarm circuit (connected in series) if the heating/cooling system cannot be disrupted.
TESTING
1. Unplug the condensate pump so that it cannot pump out water. Fill water into the pump reservoir until it is
almost full. The safety switch should activate before the float contacts the cover.
2. Plug in the condensate pump. The float should activate the pump and pump the water out.
As the water level goes down in the reservoir, the safety switch should reset, allowing the appliance to start or shut off the
alarm.
Troubleshooting
Problem
Possible Cause
Corrective Action
The pump does not start.
1. The fuse is blown.
2. The breaker is tripped.
3. The plug is disconnected.
4. The plug is corroded.
5. The float is stuck.
6. The water level is too low.
1. Replace the fuse.
2. Reset the breaker.
3. Secure the plug.
4. Clean the plug prongs.
5. Clean the reservoir and ensure
the float moves freely.
6. Allow the water level to rise to
about 2 in. below the top of the
pump cover for the pump to start.
The pump is unable to pump out
water.
1. The tubing is kinked, bent sharply, or
coiled.
2. The tubing length is too long.
1. Straighten the tubing.
2. Shorten the discharge tubing.