York EVJC 12 Installation Instructions Manual Download

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1.Starting estimation:
After the compressor stopped working for 180s, if T

inner pipe

˚ Ǐ

frozen-preventing frequency-limited temperature

(the

temperature of hysteresis is 2

), the machine is only allowed to start for operating, otherwise it should not be

started, and should be stopped to treat according to the frozen-preventing protection:
Clear the trouble at the mode of power turn-off / heating, and the protection times are not counted.
2. Raising the frequency slowly:
During the process of raising frequency, if the

frozen-preventing frequency-limited temperature

≤

inner pipe

˘Ǐ

frozen-preventing

frequency-raising temperature

, the frequency-raising speed should be executed according to the

preventing protection frequency

slow raising speed

; If

frozen-preventing slowly raising frequency temperature

≤

inner pipe

, you should exit the slowly raising control.

3. Frequency limited

frozen-preventing normal speed frequency-reducing temperature

≤

inner pipe

˘Ǐ

frozen-preventing frequency-limited temperature

, you should

limit the frequency raising of compressor.
4. Reducing frequency at normal speed:
If

frozen-preventing high speed frequency-reducing temperature

≤

inner pipe

˘Ǐ

frozen-preventing normal speed frequency-reducing temperature

you should adjust the compressor frequency by reducing 8Hz/90s till the lower limit;
5. Reducing frequency at high speed:
If

frozen-preventing power turn-off temperature

≤

inner pipe

frozen-preventing high speed frequency-reducing temperature

you should adjust

the compressor frequency by reducing 30Hz/90s till the lower limit;
6. Power turn-off:
If the T

inner pipe

˘Ǐ

frozen-preventing power turn-off temperature

, then frozen-preventing protect to stop the machine; If

frozen-preventing frequency-limited temperature

ǐ˘

inner pipe

, and the compressor has stopped working for 3 minutes, the

whole machine should be allowed to operate.
7. If the frozen-preventing protection power turn-off continuously occurs for six times, it should not be resumed
automatically, and you should press the ON/OFF button to resume if the fault keeps on. During the process of
running, if the running time of compressor exceeds the

evaporator frozen-preventing protection times zero clearing time

, the times

of frozen-preventing power turn-off should be cleared to recount. The mode of stopping the machine or
transferring to supply air will clear the trouble times immediately (if the trouble can not be resumed, mode
transferring will not clear it).

(2) Overload protection function
Overload protection function at the mode of Cooling and dehumidifying

1. Starting estimation:
After the compressor stopped working for 180s, if T

outer pipe

˘ Ǐ

Cooling overload frequency-limited temperature

(the

temperature of hysteresis is 2

), the machine is allowed to start, otherwise it should not be started, and should

be stopped to treat according to the overload protection:
Clear the trouble at the mode of power turn-off / heating, and the protection times are not counted.
2. Raising the frequency slowly:
During the raising process of pipe temperature and frequency, if the

Slowly raising frequency temperature of Cooling overload

≤

outer pipe

˘Ǐ

Cooling overload frequency-limited temperature

, the frequency raising speed should be executed according to

the

slowly raising speed of

preventing protection frequency

; If T

outer pipe

˘Ǐ