Operational Description - Toshiba HWT-601XWHM3W-ETR Service Manual

7

Operational description

This chapter describes the working circuit and control of Air to Water Heat Pump about the following operations.
7-1. Basic Operation
1) Operation control
7-1 2) Hot water supply operation
3) Heating operation
4) Cooling operation
7-2. Operation Mode and Control Method
1) Heat pump operation range of hot water supply, heating and cooling
2) Hot water supply operation
3) Heating operation
4) Cooling operation
5) Simultaneous operations of "hot water supply" and "heating"
6) Simultaneous operations of "hot water supply" and "cooling"
7-2
7) Boiler control
8) Hot water boost operation
9) Anti bacteria operation
10) Night setback operation
11) Frost protection operation
12) Auto operation
13) Night time low-noise operation
7-3. Hydro Unit Control
1) Capacity control (compressor, high-temperature release, low-temperature release)
2) Heater control
3) Circulation pump control
4) Control by the flow sensor
5) Mixing Valve control (2-temperature heating control)
6) Room temperature control
7) Room temperature control with the thermostat
7-3 8) Hot water cylinder thermostat control
9) Control of Mode selection and forced stop & restart
10) Control of limit of heat pump operation (Tempo1, 2)
11) Connection to a Smart Grid network (SG ready)
12) Output signal control
13) Q-H characteristics of hydro unit
14) Automatic restart control
15) Piping freeze prevention control
16) High return water protect control
7-4. Outdoor unit control
1) PMV (Pulse motor valve) control
2) Discharge temperature release control
3) Current release control
4) Outdoor fan control
5) Defrosting control
6) Winding heating control
7-4 7) Short circuit operation prevention control
8) Over current protection control
9) High pressure release control
10) High pressure switch
11) Compressor case thermostat
12) Bottom plate heater control
13) Start up from hibernation
14) Liquid injection control
Item
51
Page
52 to 54
55 to 67
67 to 85
86 to 94