Mitsubishi Electric EHSC-MEC Service Manual page 67

10-6. Checking Component Parts' Function
Part Name
Signal cable
3
M
1~
3
Power cable
GREEN/
YELLOW
<Recommended water flow rate range>
Outdoor heat pump unit
Packaged PUHZ-W50
model
PUHZ-W85
PUHZ-W112
PUHZ-HW112
PUHZ-HW140
Split model SUHZ-SW45
PUHZ-SW40
PUHZ-SW50
PUHZ-FRP71
PUHZ-SW75
PUHZ-SW100
PUHZ-SW120
PUHZ-SHW80
PUHZ-SHW112
PUHZ-SHW140
PUMY-P112
PUMY-P125
PUMY-P140
Note: If the water flow rate is less than 7.1 L/min, the flow rate
error will be activated. If the water flow rate exceeds 27.7 L/
min, the flow speed will be greater than 1.5 m/s, which
could erode the pipes.
OCH571D
BROWN
PWM input signal
BLUE
Signal ref.
BLACK
Feedback signal
BROWN
L
BLUE
N
Water flow rate range [L/min]
7.1–14.3
10.0–25.8
14.4–27.7
14.4–27.7
17.9–27.7
7.1–12.9
7.1–11.8
7.1–17.2
11.5–22.9
10.2–22.9
14.4–27.7
20.1–27.7
10.2–22.9
14.4–27.7
17.9–27.7
17.9–27.7
17.9–27.7
17.9–27.7
<Water Circulation Pump Characteristics>
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
80.0
70.0
60.0
50.0
40.0
30.0
20.0
10.0
0.0
0.0 5.0 10.0
Note: For installation of EHPX series, set its pump speed with a pressure drop between
the hydrobox and the outdoor unit factored into the external static pressure.
67
Check Points
EHSC series
Speed 5 (Default)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0 35.0
Flow rate [L/min]
EHSD series
Speed 5 (Default)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0 35.0
Flow rate [L/min]
ERSC series
Speed 5 (Default)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0 35.0
Flow rate [L/min]
ERSD series
Speed 5 (Default)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0 35.0
Flow rate [L/min]
EHPX series
Speed 5 (Default)
Speed 4
Speed 3
Speed 2
Speed 1
15.0 20.0 25.0 30.0 35.0 40.0
Flow rate [L/min]
40.0
40.0
40.0
40.0
45.0