Panasonic CZ-256ESMC3 Technical Data Manual

Also see for CZ-256ESMC3: Quick reference Operating instructions

ー 5 ー1. Communication error relatedFault diagnosis1-2. [C17] or [Outdoor C17] error appears on [Alarm list] screen1 Detection methodIf the communication adaptor cannot receive data from the indoor or O/D unit for a certain period of time orlonger, or if an error is detected in the received data.2 Diagnosis of failure1. Unit 1-1 Is there a unit that is turned off? Yes Turn on thepowerNo 1-21-2 Is there looseness, a disconnection, an open circuit, or a shortcircuit in the inter-unit control wiring connection?Yes CorrectwiringNo 1-31-3 Are there any of the following types of deficiencies in theconstruction of the inter-unit control wiring?· Running in parallel with power lines· Branch points exceed 16 places· The total extension exceeds 1 km· There is re-branching after branching· There is a branch point with many branches (“star” or“octopus” configuration)· The distance between one branch point and the next branchpoint is 2 m or less· Defective termination resistance settings (too low or too high)· When shielded wire is used, the shield is grounded on bothsides or not groundedYes ReconstructproperlyNo 2-12. Intelligent Controller 2-1 Is there looseness, a disconnection, an open circuit, or ashort-circuit in the wiring of 1, 2 (LINK1) or 4, 5 (LINK2) of theIntelligent Controller's 27P terminal board?Yes CorrectwiringNo 33. Replace the communication adaptor board for which there is an alarmOr, replace the product main unit1-3. [C19] error appears on [Alarm list] screen1 Detection methodWhen there are multiple adaptors with the same address in one communication adaptor control wiring system.2 Diagnosis of failure1. Communicationadaptor1-1 Is there more than one adaptor with the same address in onecommunication adaptor control wiring system?Yes Modifysettings *No 2-12. Communicationadaptorcontrol wiring2-1 Are there any of the following types of deficiencies in theconstruction of the communication adaptor control wiring?· Power lines and bundled lines or running in parallel· The total extension exceeds 1 km· It is not a crossover wiring (there is a branch point)· Shielded wire is not used· The shield is grounded on both sides or not groundedYes ReconstructproperlyNo 33. Replace the adaptor board for which there is an alarmOr, replace the product main unit* After correctly setting the adaptor address, perform [Check configuration] on the IntelligentController screen, to confirm.* [Check configuration] is displayed under [Settings] → [System settings].1-4. [Disc.] error appears on [Alarm list] screen1 Detection methodIt is the same as for “1-1. [C06] error appears on [Alarm list] screen”. However, if an air conditioner is connectedto the communication adaptor, a “Disc.” error is displayed on that air conditioner (Indoor unit, Outdoor unit).2 Diagnosis of failureRefer to “2 Diagnosis of failure” in 1-1.