Sanyo AHX0752 - Manual (Page 104)

6-2
Service Checker
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1. Outdoor Unit Maintenance Remote Controller
● The special service checker wiring is required in order to connect the outdoor unit maintenance remote controller
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
■ 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.
• 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
• 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.
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
Outdoor unit maintenance
remote controller
Special service checker wiring
Remote controller Assy
* Operation manual included in package.
Outdoor unit
Outdoor unit
control PCB
Inter-unit control wiring
Indoor unit Indoor unit
Remote
controller
Remote
controller