Hitachi RWM-(H)FSN3E, Руководство по обслуживанию

Страница: 418 / 424

12 Troubleshooting
SMGB0070 rev. 1 - 08/2011
408

Fault diagnosis procedure
Fault diagnosis of DC fan motor. About fan motor fault diagnosis:
When ISPM/DIP-IPM is faulty and alarm 53 appears, the fan motor may also be damaged. After replacing the new ISPM/
DIP-IPM, ISPM/DIP-IPM will be damaged again if it operates with a damaged fan motor. Check also if the fan motor is not
damaged when IPM/DIP-IPM is replaced.
C A U T I O N
• Turn OFF main power before start working.
• Working and checking with the power ON may disturb correct diagnosis and may result in failure.
Models with DC motor(s) Nº of motors
RAS-2HVRN2
1 Piece
RAS-3HVRNME-AF
RAS-(4-10)H(V)RNME-AF
2 Pieces
RAS-(8/10)HRNME-AF
Procedure in case of error diagnosis
1 Remove fan motor connectors from the control PCB, ISPM or DIP-IPM and turn the fan motor shaft by hand.
Normal Fan motor shaft turns smoothly
Faulty No continuous rotary torque movement felt when turning the motor by hand. This occurs because the
internal magnet of the fan motor breaks the movement when the internal electronic circuit of the fan
motor has a short-circuit fault.
2 Measure the fan motor resistance:
Measurement procedure
1 Remove the fan motor connector from the control PCB, ISPM or DIP-IPM.
2 Connect the black test lead of the tester to the black wire pin of the fan motor connector.
3 Connect the red test lead to the wire connector pin to be checked.
Results
Normal Observed values will be close to the normal values in the table below.
Faulty Obbserved values will be deviated from the normal values in the table below. (Generally, an open-
circuit fault shows ∞, and a short-circuit fault shows several Ω - kΩ).
Internal electronic circuit fault of the fan motor including short-circuit and breakage can be checked.
Model Motor model
Wire color for checking (Normal value)
Red-black White-black Yellow-black Blue-black
RAS-2HVRN2
FPD10U4OS-902 or
DAJ12-55V71
13.5 - 14.4kΩ 1MΩ or greater 225-226kΩ 1MΩ or greater
RAS-4H(V)RNME-AF (upper)
RAS-(4-6)H(V)RNME-AF (lower)
SIC-65FV-D840-1 1MΩ or greater 26-50kΩ 168-312kΩ 1MΩ or greater
RAS-3HVRNME-AF
RAS-(5/6)HVRNME-AF (upper)
SIC-68FV-D851-7 1MΩ or greater 42-78kΩ 168-312kΩ 1MΩ or greater
RAS-(8/10)HRNME-AF SIC-81FV-D8138-1 1MΩ or greater 42 - 78kΩ 168-312kΩ 1MΩ or greater
Values are shown for referential purpose. While actual values may vary depending on the type of the tester, any tester can
be used to determine any short-circuit or breakage based on ∞ or several Ω or 0 Ω or ∞.