Check And Test Operation; Miswiring (Mispiping) Check - Toshiba RAS-3M26YAV-E Installation Manual

For R410A, use the leak detector exclusively manufactured for HFC refrigerant (R410A, R134a, etc.).
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The conventional leak detector for HCFC refrigerant (R22, etc.) cannot
be used because its sensitivity for HFC refrigerant lowers to approx. 1/40.
• Pressure of R410A becomes approx. 1.6 times of that of R22.
If installation work is incompletely finished, a gas leakage may
occur in the cases such as pressure rise during operation.
Therefore, be sure to test the piping connections for leaking.
• Check the flare nut connections, valve stem cap
connections and service port cap connections
for gas leak with a leak detector or soap water.
Make sure that the wiring and piping for each room
have the same alphabetical codes (A, B, C, D).
Connect and secure the power cord.
Use the power cord/cables with thickness, type
and protective devices specified in this manual.
Insulate the unused cords (conductors) with PVC
tape.
1. Turn on the power breaker.
2. Open side panel of the outdoor unit.
3. Set the indoor unit to COOL mode.
• It is unnecessary to set the temperature.
• Miswiring check can not be executed when
outdoor air temperature is 5°C or less.
4. Start the check
• Disconnect the miswiring check connector
(color : Red) from P .C. board of inverter.
Miswiring (mispiping) check by LED Indication
• For this outdoor unit, the self-miswiring (mispiping) check is possible by using five LEDs (1 Yellow + 4 Red).
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LEDs (D800 to D804) are provided on P.C. board of the inverter.
LED D800 D801 D802 D803 D804
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During
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Result of
judgement
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Check and Test Operation

MISWIRING (MISPIPING) CHECK

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Normal operation (no error)
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Checking A unit
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Checking B unit
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Checking C unit
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Checking D unit
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Crush/Clog of Pipe A
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Crush/Clog of Pipe B
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Crush/Clog of Pipe C
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Crush/Clog of Pipe D
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Miswiring/Mispiping or Crush/Clog of Pipe A, B
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Miswiring/Mispiping or Crush/Clog of Pipe A, C
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Miswiring/Mispiping or Crush/Clog of Pipe A, D
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Miswiring/Mispiping or Crush/Clog of Pipe B, C
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Miswiring/Mispiping or Crush/Clog of Pipe B, D
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Miswiring/Mispiping or Crush/Clog of Pipe C, D
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A, B, C Miswiring/Mispiping
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A, B, D Miswiring/Mispiping
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A, C, D Miswiring/Mispiping
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B, C, D Miswiring/Mispiping
A, B, C, D Miswiring/Mispiping
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Packed valve keeps closed
• Service port cap connection
• Valve stem cap connection
5. During check (Check time 3 to 20 minutes).
• When an error described in the table below occurred
check operation stops and error code is displayed
on LED.
6. After check, the result of check is displayed on LED.
• The Comp. stop when miswiring (mispiping) error
occurred.
• Confirm the contents of table below.
• Turn off the power breaker.
• Correct miswiring/mispiping.
• Connect the miswiring check connector.
• Execute the check operation again.
• Automatically return to the normal operation when it
is normal.
7. Return to normal operation.
• To return to the normal operation during check opera-
tion or after miswiring (mispiping) error has been
determined, connect the miswiring check connector.
Description
10
Flare nut
connections
(Indoor unit)
Flare nut
connections
(Outdoor unit)
LED
D800 D801 D802 D803 D804
Red
Yellow
Miswiring (mispiping)
check connector
(Color:Red)
Short → Open
Check mode
Normal operation Short
LED : Light Emitting Diode
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: LED ON
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: LED OFF
: LED Flash
1 : 4 units Multi model only
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