[
VIII
Troubleshooting ]
- 179 -
HWE1410A
GB
3) Opening and closing of the valve
Water pump
2. Water
pump
Check the connector and make sure that it is connected properly.
Check the driving power supply, control power supply for the pumps internal board, and check the control signal voltage by
connecting each voltage to ground. (Control signal voltage will be 0V when stopped and 6V when running at 100%)
If these are voltages are not correct then investigate the HBC pump power supply board.
If the supply voltages are correct, and the control signal is being sent and the pump will still not operate the likely causes are:
Internal pump control board failure - replace pump. (Note: The internal pump control board is usually damaged when remov-
ing and replacing the connector with the power supply turned on. Always remove the pump connector with the power supply
turned off.)
Coil failure - replace pump. If the windings have been damaged the pump will require replacing.
Internal mechanical failure such as bearing failure, turbine failure, magnet degradation. This will require pump replacement.
Before replacement the causes must be investigated and resolved. The pump shaft bearings and magnets can be easily dam-
aged by overheating due to dry running or water system blockage. Check the strainer for blockage, investigate the water
circuit for blockage and or foreign material, and that there is no air in the system or an uncontrolled leak.
0
700
900
800
1600
Number of pulses
Degree of valve opening (water flow rate)
Opening
the valve
Opening
the valve
Closing
the valve
Closing
the valve
Cooling
Heating
6
5
4
3
2
1
Pump
Driving power
supply,
DC268V
±
10%
Control power
(internal pump
board)
VDD (White)
GND (Black)
VCC (Red)
VSP (Brown)
Control signal,
0-6V, 6V=100%
FG (Blue)
RPM pulse signal:
4 pulses per revolution
Ouput duty about 67%
Open collector type
5mA current
Max voltage: 50V
DC15V
±
10%
0000002394.book 179 ページ 2016年1月12日 火曜日 午後4時49分
Summary of Contents for CITY MULTI CMB-WP1016V-GA1
Page 1: ......
Page 9: ...HWE1410A GB ...
Page 11: ... 2 HWE1410A GB ...
Page 27: ... I Read Before Servicing 18 HWE1410A GB ...
Page 29: ... 20 HWE1410A GB ...
Page 47: ... 38 HWE1410A GB ...
Page 55: ... III HBC Controller Components 46 HWE1410A GB 2 Power supply circuit board ...
Page 57: ... 48 HWE1410A GB ...
Page 67: ... IV Electrical Wiring Diagram 58 HWE1410A GB ...
Page 69: ... 60 HWE1410A GB ...
Page 75: ... 66 V Refrigerant Circuit GB HWE1410A ...
Page 77: ... 68 HWE1410A GB ...
Page 95: ... 86 HWE1410A GB ...
Page 117: ... VII Test Run Mode 108 HWE1410A GB ...
Page 119: ... 110 HWE1410A GB ...
Page 207: ... VIII Troubleshooting 198 HWE1410A GB ...
Page 209: ... 200 HWE1410A GB ...
Page 294: ......