Sanyo KHX2452, UHX2452, UHX0752, UHX1252 Outdoor Unit Maintenance Remote Controller, System Diagram

Service Checker

1. Outdoor Unit Maintenance Remote Controller

1. Overview

„About the outdoor unit maintenance remote controller

The outdoor unit utilizes non-volatile memory (EEPROM) on its PCB. This allows EEPROM data to replace the setting switches that were present on previous PCBs. The outdoor unit maintenance remote controller is used to set and change these EEPROM data.

In addition to setting and checking the outdoor unit EEPROM data, this remote controller can also be used to monitor the outdoor unit alarm history, monitor the various indoor and outdoor temperatures, and check the indoor unit connection status

(number of units, operating mode, etc.).

NOTE

	Outdoor unit maintenance remote controller does not function as an
	ordinary remote controller. It is therefore only used for test runs and
	during servicing.
	System Diagram
1	Outdoor unit maintenance
	remote controller	Outdoor unit	Inter-unit control wiring
	Special service checker wiring
2		Outdoor unit	Indoor unit	Indoor unit
		control PCB
	Remote controller Assy
3			Remote	Remote
	* Operation manual included in package.		controller	controller
	● The special service checker wiring is required in order to connect the outdoor unit maintenance remote controller
4	to the outdoor unit PCB.
	● Ordinary remote controllers or other controllers are still required for the indoor units, even when the outdoor unit
	maintenance remote controller is connected.
	2. Functions
5	■ Functions on the ordinary display
	(1) Press the buttons to execute the following functions.
	• All indoor units stop/start
	• Cooling/heating change
	• All indoor units test run
	(2) Display: The following displays are possible.
6	• Alarm display
	• No. of indoor/outdoor units
	• Unit Nos. of connected indoor/outdoor units
	• Operating status of indoor/outdoor units (Blinks when alarm occurs.)
	• Indoor thermostat ON
7	• Display of individual outdoor unit alarms
	• Total operating time of outdoor unit compressors

•Oil level of the outdoor unit oil sensor

•Total outdoor unit power ON time

•Outdoor unit microcomputer version, other information.

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