Temperature fluctuation issues

Troubleshoot Temperature Control

1. Make sure that the control is set correctly. Refer to Figure 1.
2. You can enter the programming mode by pressing the Scan button (SCAN) and holding for 5 seconds. The display will then flash "Prg" to indicate that you have entered the programming mode. 
3. Use (+) and (-) buttons to modify the values and press the scan (SCAN) button to save the value and go to the next screen.

Figure 1: Setpoint Programming Functions:

Screen Button		Function	Summary
1	Initial Screen	Unit Set point	The temperature that the unit is set to run
2	Press Scan	Cold Alarm Temperature	The temperature that will actuate the cold alarm (if active)
3	Press Scan	Warn Alarm Temperature	The temperature that will actuate the warm alarm (if active)
4	Press Scan	Exit Program Mode	Returns to normal operating screen

Note: If the unit is left idle for a period of 30 seconds during program mode, the program mode shall be exited. If at any point the scan button is pressed and held for a period of 10 seconds, the unit shall enter the service mode.  

Clogged Condenser

Be advised:

• Clean the condenser filters every three months.
• There is one condenser filter located in the back cage of the unit that can be accessed without removing the back cage or disconnecting the power. 
• Condensers should be cleaned at least every six months; more often if the laboratory area is dusty.
• In heavy traffic areas, condensers load with dirt more quickly.
• Failure to keep the condenser clean can result in equipment warm-up or erratic temperatures.

To clean the filter, complete the following steps:

1. Remove the filter by pulling upwards through the slot in the back cage.

2. Shake the filter to remove loose dust.

3. Rinse the filter in clean water.

4. Shake the excess water from the filter and let it dry.

5. Reinstall filter by pushing downwards through the slot in the back cage.

To clean the condenser, complete the following steps:

1. Disconnect the power.

2. Remove the filter.

3. Vacuum the condenser and clean up any loose dust.

4. Replace the filter.

5. Reconnect power.

SAFETY HAZARD CAUTION: Do not pull the filter downwards from the bottom. The condenser has sharp surfaces. Never clean around the condensers with your fingers. Some surfaces are sharp. The condenser is located in the top rear of the machine compartment.

Solution Bottles

• Make sure the solution bottles for the temperature sensors are full.
• The solution is a 50/50 mixture of glycerin and distilled water.