Vivax ACP-07CH21ZNLO, Service Manual

Page: 19 / 39

HEAT MODE
If the air conditioner is off and then turned on while set at COOL ,HEAT or DRY mode, it will
take approximately 3 minutes for the compressor to start.
The ST at heat mode is adjustable within16 ℃ -31 ℃ .
When RT ST, the compressor stops; when RT<ST-1 , the compressor starts. ≥ ℃
Once turning on the unit while set at heat mode, if all the conditions meet with the
requirement of compressor operation, the four-way valve gets charged and 8 seconds later,
the compressor and outdoor fan start running.
Heat overload protection:
For R22 series, when
when PT
≥ 63 ℃ , the compressor stops.
PT ≥ 50 ℃ , the outdoor fan stops; when PT ≤ 47 ℃ , the outdoor fan starts;
Deice control:
Conditions for activating deice:
a. The working hours of compressor accumulates to be 40 minutes.
b. When OT
≤ -4 ℃ for 1 minute.
Conditions for terminating deice:
a. When OT
≥ 15 ℃ for 1 minute.
b. Over 10 minutes of deicing operation.
CONTROL SPECIFICATION
Electric-heat control:
Conditions for initiating electric-heat function:
a. RT
≤ 23 ℃ ; b. RT+3 ℃≤ ST; c. The indoor fan runs;
d. Turn on the electric-heat key; e. PT<50 ℃
Conditions for terminating electric-heat function:
a. PT 50 ; b. RT 26 ; c. The indoor fan stops running;
d. Turn off the electric-heat key; e. Mode change.
≥ ℃ ≥ ℃
Conditions for terminating electric-heat function:
a. PT 50 ; b. RT 26 ; c. The indoor fan stops running;
d. Turn off the electric-heat key; e. Mode change.
≥ ℃ ≥ ℃
OT
15 ℃
-4 ℃
COMP ON
OFF
OFAN ON
OFF
ON
OFF 4-way
valve
TIME
30S 15S 30S 15S
10 minutes at most
18
Strong-wing prevention :
A.PT<27,the indoor fan stops running, the swing louver cannot be controlled by the remote
controller.
B.34>PT ≥ 27,the indoor fan runs at low speed, the sweep louver erects.
C.PT ≥ 34,the indoor fan and the swing louver can be controlled normally.