Sanyo KH2442 / CH2442 Service procedures Test Run, Test run procedure, Test RUN button is

Alarm message

4. Service procedures

(10) Test Run

■Preparing for Test Run

●Before attempting to start the air conditioner, check the following:

(1)All loose matter is removed from the cabinet especially steel filings, bits of wire, and clips.

(2)The control wiring is correctly connected and all electrical connections are tight.

(3)The protective spacers for the compressor used for transportation have been removed. If not, remove them now.

(4)The transportation pads for the indoor fan have been removed. If not, remove them now.

(5)The power has been connected to the unit for at least 5 hours before starting the compressor. The bottom of the compressor should be warm to the touch and the crankcase heater around the feet of the compressor should be hot to the touch. (Fig. IV-22)

(6)Both the wide and narrow tube service valves are open. If not, open them now. (Fig. IV-23)

●Test run procedure

ON

(Power must be turned ON at least 5 hours before attempting test run)

Power mains switch

0765_C_I

Fig. IV-22

Narrow tube service valve (3-way valve)

Wide tube service valve (ball valve)

Fully OPEN Fully OPEN

1371_C_I

Fig. IV-23

❏The purpose of the test run function is to let you control the operation of the unit directly without the thermostat turning the unit on or off. As indicated in the following procedure, switch out of TEST RUN when you are finished, or the air conditioner can be damaged because it will not cycle on and off normally.

❏To protect the air conditioner from overloading, the outdoor unit will not start running for 3 minutes after power is applied or the unit is turned OFF.

a Press the (TEST RUN) button on the remote controller. (Fig. IV-24)

4

bPress the (ON / OFF operation) button to start the test run.

cPress the (MODE) button to select either COOL or HEAT mode.

dWhen the test run has started, “TEST” shows on display of the remote controller.

eDuring the test run, the air conditioner runs continuously and the thermostat does not control the system.

fAfter the test run, press the button once again to cancel this mode and check that “TEST”

is not shown on the display.

The TEST RUN button is

CAUTION used only for servicing the air conditioner. Do not press this button for normal operation, or the system may be damaged.

TEST RUN/CHECK button

ON/OFF operation MODE button button

2057_C_I

Fig. IV-24

SM830082

IV - 40