Outdoor Unit - Toshiba MMY-MAP0806FT8P-TR Service Manual

5-2. Outdoor Unit

Item Description of operation, numerical data, and other information
1. Pulse 1. PMV1 control (PMV1)
motor valve 1) During air conditioner operation, the pulse count of a PMV1 (pulse motor valve 1)
(PMV)
is controlled between 100pls and 3000pls.
control
2) During cooling, the PMV opening is controlled on the basis of measurements
provided by the TL temperature sensor and the PD pressure sensor (subcool
control).
3) During heating, the PMV opening is controlled on the basis of measurements
provided by the TS, TD and TG temperature sensors and the PS
pressure sensor (super heat control).
4) PMV are fully closed when the air conditioner is in thermostat OFF state or upon
being turned off normally or shut down due to an abnormality.
3000
100
Minimum
2. PMV4 control
1) PMV4 (Pulse Motor Valve) is controlled between 0 and 500 pulses at collective
cooling / heating operation.
2) PMV4 opening is controlled according to the demand capacity difference (HP)
between cooling and heating operation.
3) PMV are fully closed when the air conditioner is in thermostat OFF state or
upon being turned off normally or shut down due to an abnormality.
MAX
1000
0
MAX
500
45
0
Collective heating operation area
PMV1
Maximum
Controlled between
90 and 1000 pulses
SH control
– 10
Cooling-heating demand capacity difference (HP)
– 2
Cooling-heating demand capacity difference (HP)
During air conditioner operation.
2
0 10
Collective cooling operation area
− 78 −
Remarks