Thermo King multi-temp

[m_l_ca]

What is the proper way to check the refrigerant level in a Thermo King multi-temp?

[DaButcher]

What is the proper way to check the refrigerant level in a Thermo King multi-temp?

Place a test box over each evaporator.
Install a gauge manifold.
Run all the evaporators on cool until the return air temperature in each box is at 0 F (-18 C).
By allowing a box to leak a small amount, you will be able to maintain 0 F (-18 C).
The suction pressure should be 13 to 18 psi (90 to 124 kPa).
The discharge pressure should be at least 275 psi (1896 kPa).
If the pressure is below this, it can be raised by covering a portion of the roadside condenser grille with a piece of cardboard to block condenser airflow. 6.
Under these conditions, refrigerant should be visible in the receiver tank sight glass.
If refrigerant is not visible in the receiver tank sight glass, the unit is low on refrigerant.

[m_l_ca]

That sounds fine and dandy, in a shop. But lets say your on a road call. Rear box set to 40F and the front set for -10F. Rear box is A+, but the front is only getting about minus 2 or 3.

[cadwaladr]

That sounds fine and dandy, in a shop. But lets say your on a road call. Rear box set to 40F and the front set for -10F. Rear box is A+, but the front is only getting about minus 2 or 3.

run all evaps on cooling check pressures on your guages,404a with a 10 degree c ambient head pressure should be around 250 psi.

[DaButcher]

That sounds fine and dandy, in a shop. But lets say your on a road call. Rear box set to 40F and the front set for -10F. Rear box is A+, but the front is only getting about minus 2 or 3.

True, you didn't specify empty or loaded, so you got the empty "how to"

PM me and I'll get you better info

[Andy Longhurst]

Run all compartments in cool use pressure relationship. amibent add 15 this will give you the head pressure top up to the head pressure not the sight glass

[gravy258]

is it a truck or trailer unit.

Usually the sight glass is full of liquid, all the time on a trailer unit.(unit off also)
We were taught to get all zones to freezer temp. Then whilst in cool modes cover condenser to 320psi head. Ball should be semi floating. Adjust so it is.

[lakustavd]

Hi everyone! Needs the help on SMX II TCI SR TG IV. Unit is not started , display twinkles ,emergency codes 61 and 15. errors do not disappear

[abbsnowman]

Your alarms are Glow plugs and battery. Check your battery connections to start.