Mitsubishi Electric e Series Service Handbook page 104

[ VII Control ]
Control Method
-8- Automatic operation of pump for freeze-up protection
1. Purpose
This is a function to protect the water circuit from freezing up in winter.
2. Pump wire connection
3. Natural freeze-up protection
Control method
Details
HWE20010
CN3K
1 2 3
K01 K02
Natural freeze-up protection based on the water temperature
Pump start conditions Water temperature is within 3 ºC
Pump stop conditions Water temperature is more than 5 ºC
M
MP
3
~
52P
52P
PL
Pump error
F
ELB
L1 L2 L3 N
- 95 -
power supply
3N~
50Hz
380/400/415V
GB