[
IX
Troubleshooting ]
- 238 -
HWE1113B
GB
4) 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.
-1
00
1
00
300
500
700
900
11
00
1
300
1
500
Number
o
f
pulses
Degree
o
f
valve
opening
(water
f
low
rate)
O
pening
t
h
e
valve
Closing
t
h
e
valve
6
5
4
3
2
1
Pump
Driving
power
suppl
y,
DC2
68
V
±
1
0%
Control
power
(internal
pump
board)
VDD
(W
h
ite)
G
ND
(Bla
ck
)
VCC
(Red)
V
S
P
(Brown)
Control
signal
,
0
-
6
V
, 6
V
=
1
00%
F
G
(Blue)
RPM
pulse
signal
:
4
pulses
per
revolution
O
uput
dut
y
about
67%
O
pen
c
olle
c
tor
t
y
pe
5
mA
c
urrent
Max
voltage
: 50
V
DC1
5
V
±
1
0%
Содержание City Multi CMB-WP108V-G
Страница 1: ...AIR CONDITIONER 2014 Service Handbook PURY WP200 WP250YJM A CMB WP108V G Model 3rd edition ...
Страница 11: ... 2 HWE1113B GB ...
Страница 27: ... I Read Before Servicing 18 HWE1113B GB ...
Страница 29: ... 20 HWE1113B GB ...
Страница 57: ... 48 HWE1113B GB ...
Страница 70: ... III Outdoor Unit Components 61 HWE1113B GB 2 Power supply circuit board ...
Страница 71: ... III Outdoor Unit Components 62 HWE1113B GB ...
Страница 73: ... 64 HWE1113B GB ...
Страница 81: ... IV Remote Controller 72 HWE1113B GB ...
Страница 83: ... 74 HWE1113B GB ...
Страница 88: ... 79 HWE1113B GB VI Refrigerant Circuit 1 Refrigerant Circuit Diagram 81 2 Principal Parts and Functions 83 ...
Страница 89: ... 80 HWE1113B GB ...
Страница 97: ... 88 HWE1113B GB ...
Страница 127: ... 118 HWE1113B GB ...
Страница 135: ... VIII Test Run Mode 126 HWE1113B GB ...
Страница 137: ... 128 HWE1113B GB ...
Страница 252: ... 243 HWE1113B GB X LED Monitor Display on the Outdoor Unit Board 1 How to Read the LED on the Service Monitor 245 ...
Страница 253: ... 244 HWE1113B GB ...