Manitowoc QF0400 Service Manual

Also see for QC0700: Installation, use & care manual Service manual Building instructions Technician's handbook

Contents

Manitowoc QF0400 Service Manual Manual pdf 112 page image

Electrical System Section 66-50 Part No. 80-1214-3WATER LEVEL PROBESFunctionThe water level probe protects the compressor if water is not detected.Water contacting the probes will complete the circuit and energize the Water Level Probe light.There are two water level probes; one probe is connected to the circuit board and one probe is connected to the icemachine ground.Water level probe operation can be determined by watching the Water Level Probe light. The Water Level Probe lightis on when water contacts the probe, and off when no water is in contact with the probe. The Water Level Probe lightfunctions any time power is applied to the ice machine, regardless of toggle switch position.During the Water Fill and Freeze cycle, the water level probe monitors the water level. The water float valve maintainsthe correct water level. If the water level is incorrect, refer to “Water Float Valve.”Failure ModesWATER LEVEL PROBE OPEN OR DISCONNECTED (ICE MACHINE WILL NOT START COMPRESSOR.)Performs initial start-up procedure. Ninety seconds after ice machine enters Water Fill (1B), the ice machine willinitiate an Automatic Shut-Off cycle, flash the Water Level Probe light and remain off for 60 minutes. (Refer to “NoWater” SafeGuard for additional information.)WATER LEVEL PROBE CLOSED OR SHORTED (ICE MACHINE WILL CONTINUE TO RUN.)If the ice machine runs out of water with the water level probe shorted, the ice machine will initiate an Automatic Shut-Off cycle and flash the Temperature light. (Refer to “Temperature is Too High or Too Low SafeGuard” for additionalinformation.)CHECK PROCEDUREWATER LEVEL PROBE OPEN OR DISCONNECTED1. Determine which water level probe is connected to “water level” on the control board.2. Remove water level probe from reservoir and place jumper wire from the water level probe to ground.3. Move the toggle switch to the ICE position, wait45 seconds, and then monitor the Water Level Probe light.Step 3 Jumper water level probe to groundWater Level light is: Compressor CauseOn Energizes Control system is operating normallyVerify water level is correct.Off Remainsde-energized Proceed to step 4.WATER LEVELPROBE LIGHTJUMPER FROMWATER LEVELPROBE TOGROUNDSV2042Revised 8/2003Downloaded from www.Manualslib.com manuals search engine