10-6. Checking component parts' function
Part Name
Check Points
Water circulation pump (primary circuit)
Water circulation pump (sanitary circuit)
Measure the resistance between the terminals with a tester.
(Winding temperate 20°C)
Terminal
Normal (speed 2)
Abnormal
L-N
211 Ω
Open or Short
DHW circulation pump MUST be set to speed 2.
Immersion heater
Measure the resistance between the terminals with a tester.
(Winding temperate 20°C)
Terminal
Normal
Abnormal
A-B
19.2 Ω
Open or Short
To reset the immersion heater use a pin or similar to press the reset button lo-
cated on the top of the immersion boss.
See diagram on the left.
L
Signal cable
3
3
Power cable
BROWN PWM input signal
Feedback signal
Signal ref.
BLUE
BROWN
GREEN/
YELLOW
BLUE
BLACK
M
1~
N
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
0.0
5.0
10.0 15.0 20.0 25.0 30.0 35.0 40.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
0.0
5.0
10.0 15.0 20.0 25.0 30.0 35.0 40.0
0.0
10.0
20.0
30.0
40.0
50.0
60.0
70.0
80.0
0.0
5.0
10.0 15.0 20.0 25.0 30.0 35.0 40.0
L N
M
1~
75
<Water circulation pump (primary circuit) characteristics>
<Recommended water flow rate range>
Outdoor heat pump unit
Water flow rate range [L/min]
Packaged model
PUHZ-W50
7.1-14.3
PUHZ-W85
10.0-25.8
PUHZ-W112
14.4-27.7
PUHZ-HW112
14.4-27.7
PUHZ-HW140
17.9-27.7
Split model
SUHZ-SW45
7.1-12.9
PUHZ-SW40
7.1-11.8
PUHZ-SW50
7.1-17.2
PUHZ-FRP71
11.5-22.9
PUHZ-SW75
10.2-22.9
PUHZ-SW100
14.4-27.7
PUHZ-SW120
20.1-27.7
PUHZ-SHW80
10.2-22.9
PUHZ-SHW112
14.4-27.7
PUHZ-SHW140
17.9-27.7
PUMY-P112
17.9-27.7
PUMY-P125
17.9-27.7
PUMY-P140
17.9-27.7
External
static
pressure
[kPa]
Flow rate [L/min]
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
External
static
pressure
[kPa]
Flow rate [L/min]
External
static
pressure
[kPa]
Flow rate [L/min]
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
Speed 5 (Default setting)
Speed 4
Speed 3
Speed 2
Speed 1
E*ST20C series
E*ST20D series
EHPT20X series
OCH570C
Summary of Contents for EHPT20X-MHCW
Page 108: ......
