Sanyo KHX1852, UHX2452 Temperature monitor, All units start/stop Fig, Cooling/heating change Fig

Service Checker

1. Outdoor Unit Maintenance Remote Controller

■Temperature monitor

Displays the temperature from each indoor/outdoor sensor.

■Outdoor unit alarm history monitor Displays the outdoor unit alarm history.

■Setting the outdoor unit EEPROM data

Settings mode 1 and settings mode 2 can be used to make outdoor unit EEPROM data settings.

3.Ordinary Display Controls and Functions

■Functions on the ordinary display

Connect the special service checker wiring to the outdoor unit PCB.

The connection diagram is shown below.

	● If the inter-unit control wiring
Outdoor unit PCB	is connected, it can be left
	as-is.
RC (3P, blue)
	● In the case of an independent
PCB connector (3P, blue)	outdoor unit (1 maintenance
	remote controller connected
	to 1 outdoor unit, automatic
Special service checker wiring	address setting for indoor
	units not completed), both
	setting mode 1 and setting
Relay connector (2P, white)	mode 2 can be used for
	outdoor unit EEPROM data
	settings.
	● The overall system status for
Outdoor unit maintenance remote controller	that refrigerant system is
	displayed.

All units start/stop (Fig. 6-1)

<Operation>

The (ON/OFF operation) button can be used to start and stop all LED indoor units.

• The LED illuminates if any indoor unit is operating.

• The LED blinks if an alarm occurs at any of the operating indoor units.

Cooling/heating change (Fig. 6-1)

<Operation>

The (MODE) button can be used to change between heating andFig. 6-1cooling operation.

•The display indicates the operating mode of the indoor unit with the lowest unit No.

1

2

3

4

5

All units test run (Fig. 6-2)

<Operation>

The (CHECK) button can be used to start and stop a test run for all units.

(To start, press and hold the button for 4 seconds.) During the test run, “Test” is displayed.

• The status of test runs performed from the indoor unit remote controller is not displayed on the outdoor unit maintenance remote controller.

6-3

Fig. 6-2

6

7

8