6
- 2
2-WAY MULTISET VRF SYSTEM
Service Checker
6
1-1. 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 mainte-
nance 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 tempera-
tures, and check the indoor unit connection status
(number of units, operating mode, etc.).
Ourdoor unit maintenance remote controller does not function as
an ordinary remote controller. It is therefore only used for test runs
and during servicing.
NOTE
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
The special service checker wiring is required in order to connect the outdoor unit maintenance remote con-
troller 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.
1-2. 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. OUTDOOR UNIT MAINTENANCE REMOTE CONTROLLER
