Toshiba RAV-SM2242DT-E Service Manual page 45

[P19 error]
Is operation of 4-way valve normal?
YES
Is refrigerant flow by PMV normal?
YES
Are resistance value characteristics
of TC sensor normal?
YES
∗ Refer to temperature-Resistance value
characteristic table.
• In cooling operation, the outdoor unit [P19 error] may be displayed when high pressure is abnormally up.
In this case, referring to item [P04 error], eliminate the pressure-up cause and then diagnose the error again.
NO
In heating mode,
4-way valve coil terminal 200V
YES
Check 4-way valve.
Defective → Replace
NO
Check and replace PMV.
NO
Replace TC sensor.
Check indoor P.C. board (MCC-1403).
– 45 –
NO
Is circuit wiring normal?
YES
Check CDB P.C. board.
YES
Defective → Replace
NO
Check and correct circuit.
NO
Check CDB P.C. board.
Defective → Replace