Carrier 38QCR018713 Installation Manual download pdf (Page 14)

Perform the electric safe check after completing installation:

1. Insulated resistance

The insulated resistance must be more than 2M .

2. Grounding work

After finishing grounding work, measure the grounding resistance by visual detection and

grounding resistance tester. Make sure the grounding resistance is less than 4 .

3. Electrical leakage check (performing during test running)

During test operation after finishing installation, the serviceman can use the electroprobe

and multimeter to perform the electrical leakage check. Turn off the unit immediately if

leakage happens. Check and find out the solution ways till the unit operate properly.

A: Lo packed valve B: Hi packed valve

C and D are ends of indoor unit connection.

CAUTION

Indoor unit

check point

Outdoor unit

check point

Cover

Fig.25

Electrical safety check●

Gas leak check●

1. Soap water method:

Apply a soap water or a liquid neutral detergent

on the indoor unit connection or outdoor unit

connections by a soft brush to check for leakage

of the connecting points of th piping. If bubbles

come out, the pipes have leakage.

Leak detector

Use the leak detector to check for leakage.

Safety and leakage check

TEST RUNNING

Test running

Perform test operation after completing gas leak check at the flare nut connections and

electrical safety check.

Check that all tubing and wiring have been properly connected.

Check that the gas and liquid side service valves are fully open.

1. Connect the power, press the ON/OFF button on the remote controller to turn the unit on.

2. Use the MODE button to select COOL, HEAT, AUTO and FAN to check if all the functions

works well.

3. When the ambient temperature is too low(lower than 17 C), the unit cannot be controlled by

the remote controller to run at cooling mode, manual operation can be taken. Manual

operation is used only when the remote controller is disable or maintenance necessary.

Hold the panel sides and lift the panel up to an angle until it remains fixed with a clicking

sound.

Press the Manual control button to select the AUTO or COOL, the unit will operate under

Forced AUTO or COOLmode(see User Manual for details).

4. The test operation should last about 30 minutes.

Manual control

button

AUTO/COOL

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Carrier 38QCR018713 Installation Manual Page 14

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