Toshiba RAV-GM 801UT-E Service Manual page 88

(1)-4. Refrigerant leak detection function
Monitors the amount of refrigerant being circulated based on the temperature sensors, compressor
rotation speed, PMV opening during operation, and detects any refrigerant leaks during operation and
indicates it using the LEDs on the outdoor unit.
CAUTION
∗ Detects any slow leaks at the stages of not cool not heat and trouble stoppages' during operation but
may not detect fast leaks sometimes.
∗ Refrigerant leaks may even be detected because of refrigerant circulation failures due to PMV (Pulse
Motor Valve) blockages, operation failures, capillary blockages, strainer blockages, etc.
∗ Refrigerant leak detection may not be possible depending on the external air temperature conditions
during operation.
If any refrigerant leaks are detected ensure to identify where the leak is, recover the remaining
refrigerant, and then recharge with the correct amount using the appropriate methods.
[Confirmation method]
1) Ensure the LED display shows the initial state. If not then it can be returned to the initial state by pushing
and holding down SW01 and SW02 at the same time for at least 5 seconds.
2) Push SW01 several times until reaching the 'refrigerant leak indication' LED display.
D800 D801 D802 D803 D804 D805 Refrigerant leak indication
: Go ON : Go OFF
3) Briefly pushing SW02 enables the presence of a leak to be detected using the LED display.
D800 D801 D802 D803 D804 D805 Judgment
: Go ON : Go OFF
4) Before exiting, push and hold down SW01 and SW02 at the same time for at least 5 seconds and set the
LED to the initial state.
Displays if a certain amount of refrigerant has leaked.
: Flash (5 times/sec)
No refrigeration leak detected
Refrigeration leak detected
: Flash (1 time/sec)
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