Toshiba HWS-P1104HR-E1(TR), Service Manual

Page: 33 / 172

32
8
Operational description
This chapter describes the working circuit and control of Air to Water Heat Pump about the following operations.
Item
Page
8-1
8-1. Basic Operation
1) Operation control
2) Hot water supply operation
3) Heating operation
4) Cooling operation
33 to 35
8-2
8-2. 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) Boiler control
8) Hot water boost operation
9) Anti bacteria (ANTI BACTERIA) operation
10) Night set back (NIGHT SET BACK) operation
11) FROST PROTECTION operation
12) AUTO operation
13) Night time low-noise operation
36 to 47
8-3
8-3. 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 switch
5) Mixing Valve control (2-temperature heating control)
6) Room temperature control
7) Room temperature control with the thermostat
8) Hot water cylinder thermostat control
9) Control of force stop and restart
10) Control of limit of heat pump operation
11)Output signal control 1
12)Output signal control 2
13) Q-H characteristics of hydro unit
14) Automatic restart control
15) Piping freeze prevention control
16) High return water protect control
48 to 64
8-4
8-4. Outdoor unit control
1) PMV (Pulse motor valve) control
2) Discharge temperature release control
3) Current release control
4) Current releases shift control
5) Outdoor fan control
6) Defrosting control
7) Winding heating control
8) Short circuit operation prevention control
9) Over current protection control
10) High pressure release control
11) Compressor case thermostat
12) Bottom plate heater control
13) 2-way valve control
14) Start up from hibernation
65 to 73
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