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5-2
5. Outdoor unit maintenance remote control
5-1. Overview
What is the outdoor unit maintenance remote controller?
Beginning with the DC-INV series of outdoor units, nonvolatile memory (EEPROM) is
used in the outdoor unit PCB. In this way, the setting switches that were located on
earlier PCBs have been converted to EEPROM data. This remote controller is an
outdoor unit maintenance tool that is used to make and change the EEPROM set-
tings.
This remote controller can be used for checking the outdoor unit EEPROM settings
and contents, and also can be used to monitor the outdoor unit alarm history and
indoor/outdoor unit temperatures, and to check the status of the indoor unit connec-
tions (No. of units, operating status, etc.).
Note: Because this tool does not function as a remote controller, it is used only
during test runs and servicing.
System diagram
Outdoor unit maintenance
remote controller
Remote controller
Outdoor unit
Outdoor unit
control PCB
Inter-unit control wiring (main bus)
Indoor
unit
Indoor
unit
Remote
controller
Remote
controller
Special service checker wiring
(Optional, Servicing No:CV6231785082)
* The special service checker wiring is required in order to connect the outdoor unit maintenance remote control-
ler to the outdoor unit PCB.
* Even when the outdoor unit maintenance remote controller is connected, a separate remote controller or other
control device must be connected to the indoor unit.
5-2. Functions
Normal display functions
(1) Functions: Button operations can be used to perform the following functions.
• Start/stop of all indoor units
• Switching between cooling and heating
• Test run of all indoor units
• High-speed operation of indoor units (Do not use with actual units. This may damage the devices.)
(2) Display: The following can be displayed.
• Alarm details display
• No. of indoor/outdoor units
• Unit Nos. of connected indoor/outdoor units
• Indoor/outdoor unit operating status (blinks when an alarm occurs)
• Indoor unit thermostat ON
• Individual display of outdoor unit alarms
• Outdoor unit compressor total operating time
• Outdoor unit oil sensor oil level
• Outdoor unit total power ON time
• Outdoor unit microcomputer version
• Other
Temperature monitor
• Displays the indoor/outdoor unit sensor temperatures.
Outdoor unit alarm history monitor
• Displays the outdoor unit alarm history.
Setting modes
• Setting mode 1 and setting mode 2 are used to make the outdoor EEPROM setting.
CZ-RTC2
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