In The Case Of Cz-Rtc4; Overview - Panasonic U-26PE1U6 Technical Data & Service Manual

In the case of CZ-RTC4

5-7. Overview

n About the outdoor unit maintenance remote controller
The outdoor unit utilizes nonvolatile 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.
Outdoor unit maintenance
System diagram
Special service checker wiring
(Servicing No.: CV6231785082)
A
Operation manual included in package.
The special service checker wiring is required in order to connect the outdoor unit maintenance remote controller
l
to the outdoor unit PCB.
Ordinary remote controllers or other controller are still required for the indoor units, even when the outdoor unit
l
maintenance remote controller is connected.
remote controller
Interface for
outdoor unit
maintenance
remote controller
(Servicing No.:
Remote controller Ass'y
CV6231616171)
5. Outdoor unit maintenance remote control
[Service Checker Section]
A
Outdoor unit
Outdoor unit
control PCB
5-11
CZ-RTC4
Inter-unit control wiring
Indoor Indoor
unit unit
Remote Remote
controller controller
5