Conair UGH016/0500 manual Checking Pressure Switches, DAY Time, Locate the pressure switch

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CHECKING

PRESSURE

SWITCHES

WARNING: Coolant hazard

Coolant can cause freezing of skin. All proper precautions should be taken any time the cool- ing system is worked on. Any adjustment that involves the coolant should only be performed by a certified refrigeration technician.

The pressure switch is a non-adjustable switch. To check the pressure switch:

1

Locate the pressure switch.

Always refer to the wiring dia- grams you received with your chiller to locate specific elec- trical components.

	Use the wiring diagrams that came with your chiller for
	exact location. Location varies depending on size of unit.

2	Check the connections.
	Make sure all connections to the switch are secure.
	Tighten as needed.

3	Check the control signal in the electrical panel.
	Refer to the wiring diagram and the following table for
	the switch status:

Inputs

Outputs

I

1

2

3

4

5

6

7

8

9

10 11 12

			DAY
			DAY				TIME



O	1	2		3		4	5	6	7	8

In this example, inputs 7 and 8 are highlighted; they are in normal position. If they are not highlighted the input is out of range.

	Input	Description	Output	Description
	1	Chiller Stop	1	Compressor Starter
	2	Chiller Start
			2	Compressor Run Lamp
	3	Level Switch
			3	Pump Starter
	4	Flow Switch
			4	Pump Run Lamp
	5	Compressor Running
			5	Alarm Lamp
	6	Pump Running
			6	Optional Auto-Fill Solenoid
	7	Suction Pressure Switch
			7	Optional Alarm Bell
	8	Discharge Pressure Switch
			8	Optional Alarm Strobe
	9	Low Temperature Deviation

	10	Optional Auto-Fill Level Switch
	11	Pressure Differential Switch
		(7.5, 10, 15 ton only)
	12	Optional Alarm Silence

6-22TROUBLESHOOTING Series 1 Portable Chillers, TIC Control

UGH016/0500

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Contents Portable Chillers Conair GROUP, INC Table of Contents IntroductionParts and Diagrams . . . . . . . . . . . .P/D-1 Introduction Purpose User Guide HOW Guide is OrganizedYour Responsibility AS a User Read this SO no ONE Gets Hurt Page Description What is Portable CHILLER? Temperature Typical ApplicationsCooling load LocationHOW IT Works WATER-COOLED Portable Chiller Process circulationHOW IT Works HOW IT Works AIR-COOLED Portable Chiller HOW IT Works AIR-COOLED Portable ChillerChiller Features Water-cooled ModelsPortable Chiller Features Air-cooled ModelsSpecifications ModelSpecifications Pump Curves Installation Unpacking the Boxes UGH016/0500 Series 1 Portable Chillers, TIC Control Preparing for Installation Grounded power sourceAvailable water source Making Process Plumbing Connections Wrap threads with Mylar or Teflon tapeConnect the To Process valve and tubing on Filling the Chiller Attach water hose to Fill/Drain valveOpen the Fill/Drain valve and fill chiller Close the Fill/Drain valveChange the minimum operating temperature Check the coolant levelChecking Refrigerant Charge Connecting Main Power Source Connect the ground wire to grounding lugClose the electrical enclosure Turn on main power source Checking Electrical ConnectionsOpen electrical enclosure Initially Starting Chiller Press the Start Chiller buttonCheck the rotation of the pump Check the compressorStopping the Chiller Operation TIC Control Features DisplayBefore Starting Check that the casters are lockedStarting Stopping Chiller Changing Settings Changing Setpoint TemperaturePress Menu button once Press the Up/Down arrowsChanging Temperature Scale Changing to Auto Tune ModeChanging Auto Tune Mode Use the Up/Down arrows to changePress Enter button Apply a load to the ChillerSetting the to Process LOW Limit Maintenance Maintenance Features UGH016/0500 Series 1 Portable Chillers, TIC Control Preventative Maintenance Schedule Checking electrical connectionsInspecting the condenser coil for debris Checking refrigerant site glassCleaning Cleaning process fluid strainerInspecting cooling water treatment system Inspecting condenserCheck the refrigerant charge through the sight glass Cleaning Evaporator or WATER-COOLED Condenser Cleaning AIR-COOLED Condenser Coil cleanerInspect the coils Use a flashlight to check between coil surfacesBe sure the main power is disconnected Disconnect and lockout power to the chiller Checking Reservoir LevelLocate the fill port on the back of the chiller Refill the reservoirTroubleshooting Before Beginning FEW Words of CautionIdentifying Cause Problem DAY TimeAnswering AN Alarm Pump Compressor Alarm Condition Description StatusControl Problems Power is not reaching the chillerThere is a problem with the control panel Symptom Possible cause Solution Input voltage is incorrect There is a phase lossFailed Level switch Mechanical ConditionsWater level in tank is low Low Faulty contactor Faulty overload modulePump Overload Overload set incorrectly. pump and compres Low supply voltageAlarm Possible cause Overload set incorrectlyClogged/dirty air-cooled Compressor discharge Valve closedFailed flow switch Pressure switch isFaulty No or low flow with aCompressor failed Contact Conair Service Leads are backwardsChecking Replacing Switches Check the switchReplace the switches as needed Slide the top of the switch housing over untilDisconnect the wiring from the contactor Reconnect the wiring and reconnect powerReplacing the Contactor Remove the contactor by snapping offChecking and Replacing Replacing Temperature Controller Contact Conair Service for the temperatureSlide the new controller in until Reconnect wires and leads Restore power to the chillerReplacing Overload Modules Rating of compressor, fan or pumpReplacing Fuses Remove and replace fusesRemove the pump assembly Inspect, clean, and replace pump partsRemoving Pump Components Open the drain/fill valveChecking Pressure Switches Locate the pressure switchDAY Time Check the connectionsCheck the continuity within the switch Make sure it corresponds to the following conditionsPage WE’RE Here to Help From outside the United States, call2SERVICE Information Warranty Information Maintenance LOG Date Maintenance ItemPage Pressure Tables Appendix C-2Control Settings Display Parameter Description Setting UnitsPage Parts & Diagrams Recommended Spare Parts Part Number DescriptionSpare Parts P/D-3 4SPARE Parts Spare Parts P/D-5 6SPARE Parts