３
１
Relay PCB
Fig 8-1
When the outdoor temperature is lower than a certain temperature, the base heater begins to work and the
defrosting ability is enhanced.
When the outdoor temperature is higher than a certain temperature (7±3°C), the protector will work arel.
The power supply of base heater will be cut off.
When the base heater exceeds 119°C, the temp. fuse will act and cut off the power supply.
8. Base Heater Circuit
CN4
FU5(3A Fuse)
AC230V
RL5
Heater relay
VH3P
Base Heater
Temp. Fuse
protector
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