Board Exchange Procedures (Outdoor Unit) - Toshiba MMY-MAP0501HT8-E Service Manual

5-6. P.C. Board Exchange Procedures (Outdoor Unit)
n How to Check Fan Power Supply P.C. Board and Fan IPDU
The fan power supply P .C. board supplies DC power. It supplies DC280V for the fan IPDU, and DC12V and
DC7V for the control power supply respectively. If the control power is not supplied, a communication error
(Error code [E31]) is out.
1. How to check fan power supply P.C. board (MCC-1439)
As shown in the following table, measure the voltage of the check positions with a digital tester.
No.
1 DC280V output
2
Control power voltage
3
2. How to check fan IPDU
1. Check that the lead wires are correctly inserted into 250 fasten terminal of DC280V input and into the
communication connector (CN01).
2. After then replace the fan IPDU if an abnormality is recognized.
<MCC-1439 Front View>
CN503
Check item Check position
 ƒ
Between CN500 and
 …
Between CN500 and
‚ …
Between CN500 and
20
Criteria
DC260 to DC340V
DC12V
DC7V
CN500