Safety And Control Device; Hi-Therma Split; Hi-Therma Integra - Hisense Hi-Therma Series Service Handbook

2.5 Safety and control Device

Compressor protection
The compressor is protected by the following devices and their combinations.
(1) High pressure switch: This switch cuts out the operation of the compressor when the discharge pressure exceeds the
setting.
(2) Low pressure switch: This switch cuts out the operation of the compressor when the suction pressure exceeds the
setting.
Fan motor protection
When the thermistor temperature is reached to the setting, motor output is decreased. The other way, when the temperature
becomes lower, limitation is canceled.

2.5.1 Hi-Therma Split

Outdoor unit
High
For compressor Low
Fuse capacity on PCB1 (PF1)
CCP timer
Setting time
For condenser
Internal Thermostat
fan motor
Indoor unit
For Auxiliary electric heaters
For water circulation
For the control circuit
For DHW Electric Heater

2.5.2 Hi-Therma Integra

For outdoor unit safety and control device parameters, please refer to 2.5.1 Hi-Therma Split outdoor unit.
Indoor unit
Automatic Reset Thermostat
Auxiliary electric
Temperature fuse
heater
Fuse capacity 220-240V ~ 50Hz
Low water pressure protection
High water pressure protection
Water circulation
Minimum water flow rate
Water pump control
Safety valve
Control circuit Fuse capacity 220-240V ~ 50Hz
Fuse capacity 220-240V ~ 50Hz
DHW Electric Heater
Mechanical thermostat
DHW Tank Pressure relief valve
MODEL
Pressure switches
Cut-out
Cut-in
Cut-out
Cut-in
220-240V ~ 50Hz
MODEL
Automatic Reset Thermostat
Temperature fuse
Fuse capacity 220-240V ~ 50Hz
Low water pressure protection
High water pressure protection
Minimum water flow rate
Water pump control
Fuse capacity 220-240V ~ 50Hz
Fuse capacity 220-240V ~ 50Hz
MODEL
°C
°C
A
Condition 1
Condition 2
3
m /h
-
A
A
044(2.0HP)/060(2.5HP)/080(3.0HP)
°C
°C
A
Condition
1
Condition
2
3
m /h
- Water Pump status by feedback control
bar
A
A
°C Cut-out: 85ºC±5ºC, manual reset
bar
19
044(2.0HP)/060(2.5HP)/080(3.0HP)
Automatic reset, non-adjustable
MPa
0.05±0.03
MPa
0.15±0.03
A
- Non adjustable
min.
- Automatic Reset, Non-Adjustable
044(2.0HP)/060(2.5HP)/080(3.0HP)
Cut-out: 75°C±4°C
94°C
Pw<0.3Bar for 180 seconds
Pw>4.0Bar for 180 seconds
0.5(044)/0.6(060-080)
Water Pump status by feedback control
10 (Inside PCB1,EFR1)
Cut-out: 75°C±4°C
+0
94°C °C
-10
20
Pw<0.3Bar for 180 seconds
Pw>4.0Bar for 180 seconds
0.5(044)/0.6(060-080)
3
10 (Inside PCB1, EFR1)
20
7±0.5
General data
4.4±0.15
3.40±0.2
30
3
+0
°C
-10
20
20