Randell Freezer Wartungshandbuch PDF herunterladen (Seite 49)

6-1

ection 6 Component Check Procedures

Section 6

Component Check Procedures

Main Power Switch

FUNCTION

Switches power to the reach-in on and off.

SPECIFICATIONS

Double pole single throw (DPST)

CHECK PROCEDURES

1. Check for proper line voltage (± 10%).

2. Inspect the switch for proper wiring.

3. Inspect the terminals for clean, tight

connections.

4. Check across the switch terminals with a

voltmeter. Replace the switch if you do not

obtain the results below:

Switch Position Voltage

On 0

Off line

Temperature Control (Thermostat)

FUNCTION

Opens and closes to start and stop the

compressor and condenser fan(s) to maintain a

constant cabinet temperature.

SPECIFICATIONS

Constant differential

Range 0°± 2°F (-17.8° ± -16.7°C) / 5°± 2°F

(-15° ± -16.7°C)

CHECK PROCEDURES

If the reach-in continues to run in the cooling

cycle:

1. Turn the temperature control to the warmest

setting.

2. Hook a voltmeter across the temperature

control terminal leads.

3. If the voltmeter reads line voltage, the

control has opened and is functioning

normally. If the control fails to open, replace

it.

If the reach in does not run:

1. Disconnect electrical power supply.

2. Turn the temperature control to the coldest

setting.

3. Isolate the temperature control and hook an

ohmmeter across the terminals.

4. If the ohmmeter registers continuity, the

control is good.

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