Platinous User’s Manual
99
Troubleshooting
8.3.4 Defrosting
Frost may form on the cooler in temperature operations below 40°C. Defrost the chamber in the following
cases.
•
If temperature inside the chamber is uncontrollable or rises slowly.
•
If air blowing from the chamber is weak (when the door is opened.)
•
If frost or ice form on test area wall.
Use this procedure to defrost packing as well.
Procedure:
1. Check the main power switch is in the ON position.
2. Turn refrigerator control OFF. For an explanation on how to set refrigerator control,
3. Change settings so that the operation is not interrupted or an alarm generated if the chamber is run with
the door cracked slightly. Make the following settings: (For details on settings, see “Power Recovery
Setup” in 5.11 Chamber Configuration in the SCP-220 Controller Manual.)
•
Select OFF next to Chamber Operation.
4. Set target temperature to a minimum 70°C and turn OFF humidity control (not necessary with tempera-
ture-only chambers).
5. Get the Operation Mode Selection screen. Press either the OPER./START key on the operating panel
or the chamber operating status box on the screen.
6. Press the START button under Constant Mode to start the chamber. Run the chamber for about 60 min-
utes with the door closed, then for 15 minutes with the door slightly cracked.
7. Return settings made in step 3 to their original settings.
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