Filter
Top Products
– 69 –
9. CIRCUIT CONFIGURATION AND CONTROL SPECIFICATIONS
9-1. Indoor Control Circuit
9-1-1. Outline of Main Controls (This content is same 9-2-2. of Outdoor Content)
RAV-SM562AT-E, RAV-SM802AT-E, RAV-SM1102AT-E, RAV-SM1402AT-E
1. Pulse Motor Valve (P.M.V.) control
1) PMV is controlled with 50 to 500 pulses during operation, respectively.
2) In cooling operation, P.M.V. is controlled with the temperature difference between TS sensor and TC
sensor.
3) In heating operation, P.M.V. is controlled with the temperature difference between TS sensor and TE
sensor.
4) For the temperature difference in items 2) and 3), 1 to 5K is aimed as the target in both cooling and
heating operations.
5) When the cycle excessively rose in both cooling and heating operations, PMV is controlled by TD sensor.
The aimed value is usually 105°C for SM562 and 100°C for SM802, SM1102, SM1402 in both cooling
and heating operations.
REQUIREMENT
A sensor trouble may cause a liquid back-flow or abnormal overheat resulting in excessive shortening of
the compressor life. In a case of trouble on the compressor, be sure to check there is no error in the
resistance value an the refrigerating cycle of each sensor after repair and then start the operation.
a
b
c
d
e
TD [˚C]
Error stop ("P03" display with 4 times of error counts)
As command is
Frequency down
Frequency holding
Frequency slow-up
(Up to command)
I1
1–0.5
[A]
Frequency down
Normal operation
Hold
Hold
3. Current release control
The output frequency and the output voltage are controlled by AC current value detected by T02 on the
outdoor P.C. board so that input current of the inverter does not exceed the specified value.
* For the cooling only models,
only COOL is objective.
2. Discharge temperature release control
1) This function controls the operation frequency, that
is, lowers the operation frequency when the dis-
charge temperature has not lower or the discharge
temperature has rapidly risen during P.M.V. control.
It subdivides the frequency control up to a unit of
0.6Hz to stabilize the cycle.
2) When the discharge temperature is detected in an
abnormal stop zone, the unit stops the compressor
and restarts after 2 minutes 30 seconds.
The error counter is cleared when it has continued
the operation for 10 minutes.
If the abnormal stop zone has been detected by 4
times without clearing of counter, an error “P03” is
displayed.
* The cause is considered as excessively little
amount of refrigerant, defective PMV, or clogging
of cycle.
[°C]
SM562
SM802, 1102, 1402
abcde
117 107 103 100 93
111 106 100 95 90
Objective
model
I1 value [A]
SM562
COOL HEAT
10.1 12.0
SM802
COOL HEAT
12.2 14.0
SM1102
COOL HEAT
18.9 19.7
SM1402
COOL HEAT
19.7 19.7
Revised : Nov. 2006