
149
11. Service and Maintenance
0Ω
OHR
PCB
(Main)
PCB
(Main)
Fuse CF2
0639U : 250V T3.15A
1039U : 250V T3.15A
Fuse CF2
(250V T5A)
[Fig. 7] Continuity of current Fuse on the PCB (Main)
[Fig. 8] Resistance of the Compressor overheat protection relay
[1639U]
[0639U,1039U]
[Fig. 9] Voltage of humidity sensor
[Fig. 10] Voltage of 3way mixing valve (24VAC)
[Fig. 11] Voltage of 3way mixing valve (control)
0.147~9.80V
17
18
Humidity
Sensor
COM
AC24V
4
5 COM
24VAC
COM
DC10V DC0V
5
6
COM
Control
N ormal operation during the Heating mode;
The voltage of 3way mixing valve decreases from 10V toward 0V in case that the mixed water temperature is higher than the water set
point.
N ormal operation during the Cooling mode;
The voltage of 3way mixing valve decreases from 10V toward 0V in case that the mixed water temperature is lower than the water set
point.
Содержание AEYC-0639U-CH
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