Toshiba RAS-M22SKV-E Service Manual page 60

11-5-2. Wiring Failure (Interconnecting and Serial Signal Wire)
(1) Outdoor unit does not operate
1) Is the voltage between
Confirm that transmission from indoor unit to outdoor unit is correctly performed based upon the
following diagram.
NOTE:
• Measurement should be performed 2 minutes and 30 seconds after starting of the operation.
• Be sure to prepare a diode for judgment.
Terminal block at indoor side
Red
White
Normal time : Voltage swings between DC15 and 60V. ..................Inverter Assembly check (11-8-1.)
Abnormal time : Voltage does not vary.
(2) Outdoor unit stops in a little while after operation started
<Check procedure> Select phenomena described below.
1) If the unit stops once, it does not operate until the power will be turned on again.
2) The outdoor unit stops 10 minutes to 1 hour after operation started, and an alarm is displayed.
(Discharge temp. error check code 03, 1E Sensor temp. error check code 02, 1C)
Gas leak
PMV is defective.
Mis-wiring of connecting wires of indoor/outdoor units
Clogging of pipe and coming-off of TC sensor
and of the indoor terminal block varied?
3
S5277G
2
Terminal block
1
To item of Outdoor unit does not operate.
S5277G or equivalent (G or J type)
(Diode with rated voltage of 400V
or more is acceptable.)
Tester
Refer to the chart in 11-6.
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