mitsubishi city multi

[byrne]

Hi have 1501 fault on PURY-P250 gas charge is ok,so is operation pressures in heating and cooling but th 10 compressor shell temperature is 87 degrees c.could it be lack of oil in compressor.

[install monkey]

how much oil did you lose when it leaked

[JoeAT50A]

PURY-P250 YHM-A
R410A/MEL32 3.5 Liters
(Comp 2.0+ Line 1.5)

I have no idea how much you lose.
Hope this help

[byrne]

Thanks don't know how much oil was lost due to leak as i have only taken over site.will add 1 litre a see from there.

[stufus]

87c is only critical if running below 60hz for an hour
Your unit is not loading up !
Was the power dropped to the outdoor ,if so it won't run above 70hz for an hour after the power is restored.
The oil separator in those units is very efficient.
Oil is not your problem lack of compressor subcooling is.
Do an LEV reset on the indoors
Clean all the indoor filters and run it in test cooling
Check the charge composition .Guessing R407c
You're either short of gas or you've got a faulty LEV in an indoor or LEV1 in the outdoor ,or the comp is on the way out.
Cheers
Stu

[Zeppers75]

Do you have a comms room on the system? Could be lack of vapour back to the compressor due to low indoor unit index running. This can happen when there is only one indoor with demand on 24/7 on the system.
Always worth checking out with this fault.

[byrne]

Thanks found that alarm was being caused by faulty lev,was happening when only this unit was calling for cooling.

[stufus]

Glad to hear it.
Everyone likes a happy ending
Cheers
Stu