Troubleshooting No Cooling On Mitsubishi City Multi HVAC System

Found the system with 7102 fault code. After further investigation I found the system had failed control wire at outdoor unit.

[@tonyb7748]

Awesome video. I’m 20 years displaced from hvac work and this is gold for a techs .

[@HVACServiceTechnicianTalk]

Thanks I appreciate it!

[@MrSlim1959]

Mice like to chew on cable.Had one crawl between the PCB,he did not live to see another day but my outdoor unit did.😂😂

[@HVACServiceTechnicianTalk]

They definitely can be a pain

[@grandtrunk7087]

Why are those units so close to each other?

[@srulyg.4154]

Thanks for sharing

[@HVACServiceTechnicianTalk]

Thanks for watching

[@knownasjuniior4003]

Im having the same issue but i am getting 29 volts to each unit what could possibly be another issue and fix?

[@HVACServiceTechnicianTalk]

Not totally sure on that one unfortunately

[@grandtrunk7087]

Still could be the wiring, something is grounded

[@humbertomacias3239]

What was it?

[@mallkomoha6823]

Sir thanks for sharing very interesting I wonder if you can help!
How do code out master VRF Mitsubishi? We know in Daikin we use binary in Toshiba rotary dial? In Mitsubishi how is it done? Thanks

[@marwendaagi5874]

How connected Mitsubishi outdoor master with slave

[@danv.600]

How about error 6603 for mitsubishi city vrf system, how to troubleshoot

[@sudheeshlmattakulathingal562]

In which country do you work?

[@HVACServiceTechnicianTalk]

United States

[@trinito97]

I think that wire should be in a conduit

[@HVACServiceTechnicianTalk]

That definitely would have prevented the issue.

[@atishyamtekar5807]

Where does TB3 wire connect in ductable AC

[@jessebetancourt512]

You will see TB 3 at indoor fan coil,
These units are very easy to wire up

[@jessebetancourt512]

Or BC controller

[@grandtrunk7087]

M1/M2 at TB3

[@marwendaagi5874]

Communication with indoor

[@peterpeterson9998]

Where are you located?

[@HVACServiceTechnicianTalk]

PNW area

[@jackrabbitalex]

Had the rats eat the wires lasted 7 years then put it in conduit.

[@HVACServiceTechnicianTalk]

Rodents sure can be a pain in the ass