ronaldo9
05-07-2018, 05:44 PM
Hi Guys
This is annoying me
Hitachi wall mounted 7 Kw unit
Called out unit cycling on and off with no faults ,
Turns out unit is cycling off on the indoor coil thermistor, when I take the thermistor out the unit runs but started to iced up badly,
Long story short , leaking flare nut , repaired and recharged system .
HOWEVER
Unit is behaving the same way only running for longer . I’m getting frost on the suction line and if I remove the indoor coil thermistor the unit will run but will eventually ice up.
Coils are clean , charge is ok, however it seems that the LEV is wide open, couldn’t get through to tech to check coil voltages . Would this account for the suction frosting up after a couple of minutes ? What controls the LEV?
One possibility is the heat load , the outdoor is exposed to sunlight all day and with the extreme weather we are having I wonder is the system struggling . ?
This is annoying me
Hitachi wall mounted 7 Kw unit
Called out unit cycling on and off with no faults ,
Turns out unit is cycling off on the indoor coil thermistor, when I take the thermistor out the unit runs but started to iced up badly,
Long story short , leaking flare nut , repaired and recharged system .
HOWEVER
Unit is behaving the same way only running for longer . I’m getting frost on the suction line and if I remove the indoor coil thermistor the unit will run but will eventually ice up.
Coils are clean , charge is ok, however it seems that the LEV is wide open, couldn’t get through to tech to check coil voltages . Would this account for the suction frosting up after a couple of minutes ? What controls the LEV?
One possibility is the heat load , the outdoor is exposed to sunlight all day and with the extreme weather we are having I wonder is the system struggling . ?