Mitsubishi Heavy Industries FDCW100VNX, Technical Manual

Page: 150 / 173

Components
HM270V
- 149 -
Troubleshooting
Action Cause Indicator lamp
Off
1 × short + 1 × long
3 × short + 1 × long
5 × short + 1 × long
The pump is not connected or is incorrectly
connected.
Low voltage.
Temperature too high.
Pump blocked.
- Check the connection.
- Power failure. Check power supply and fuses.
- The pump restarts automatically.*
- Check max. system temperature.
- Check supply voltage.
- Open and clean the pump.
* The pump reduces the voltage automatically (the speed) at 105 °C, to stop completely at 125 °C. When the pump has cooled to 115 °C
again, it restarts automatically.
Other faults:
Action Cause Problem
Noise from pump. Air in the system.
Dirt in the pump.
Worn bearings.
- Vent the system.
- Open and clean the pump.
- Replace the pump.
Technical specifications
Connection
Length
Voltage
Frequency
Output
Circulation pump
Max pressure height
Max volume flow
Min/max temperature
Max system pressure
6 m
3000
ℓ
/h
-10 °C* to +95 °C
6 bar
G1” Accessories
130 mm
200-240 V
50/60 Hz
9–63 W
* Not frozen or condensed
0
10
20
30
40
50
60
0 0.05 0.11 0.16 0.22 0.28 0.33 0.39 0.44 0.5 0.55
kPa
Available pressure
Flow ℓ /s