Service manual

General Functionality ESIE04-01
2–4 Part 2 – Functional Description
3
1
2
4
5
1.2 Functions of Thermistors
Locating the
thermistors
.
Remark Sensor R3T on indoor coil of FCQ35~60B7V1, FFQ35~60BV1, FBQ35~60B7V1 & FHQ35~60BUV1
is not used when the indoor units are connected to RZQ outdoor units.
Functions of the
thermistors
Ther-
mistor
Location
Wiring
symbol
Mode Function
1 Indoor
heat
exchanger
R2T Cooling
P Compressor frequency control (target Te)
P Inverter current protection control
P Freeze-up control
Heating
P Compressor frequency control (target Tc)
P Inverter current protection control
P Hot start control
P Peak cut-off
2 Indoor air
return
R1T Cooling
P Thermostat control
P PMV control
P General frequency control
Heating
P Thermostat control
P PMV control
P General frequency control
3 Outdoor
heat
exchanger
R2T Cooling
P Inverter current protection control
Heating P Inverter current protection control
P Defrost control
RZQ - Final.book Page 4 Monday, September 20, 2004 11:24 AM