Hitachi RAM-130QH5 Service Manual page 69

Yes
LD301: Blinks ten times
Power source voltage
abnormally
abnormally noise
Danger! Quickly turn off the power
source and replace the SPM2.
No abnormally noise even
after replacing the SPM2.
Replace the control P.W.B..
O.K.
AC196V-265V
Check the power source voltage
(terminal board, L/N terminal)
N.G.
AC196V or less or
AC265V or more
Power source abnormally. Check
Connect the power source, than wait a
the power source.
few minutes, and forcibly turn on the
cooling. After the power relay goes on
374V or more (clicking
thecompressor does not work after the
LED blinks ten times*2, then within
three minutes check the voltage
between the SPM P1 terminal and the
N terminal.
Turn off the power source, and ten minutes
Less than 10V
later remove the SPM CN13 cords. Then
The SPM2 is broken.
check the DC voltage between the (1) pin of
Replace the SPM2.
the SPM CN13 and the N terminal within
three minutes of the power relay being turned
Doesn't work even after
on.
the SPM2 is replaced.
Check the CN13 cord.
The control P.W.B. may be broken. Replace
the control P.W.B..
Check the wiring (diode stack
blue/yellow/gray/red)
Turn off the power source, and remove the yellow
and blue wires from the diode stack.
Connect the power source, then wait a few minutes,
DC277V
and forcibly turn on the cooling (clicking sound).
or less
sound)*1, check that
Then check the AC voltage between the blue and
yellow wires within three minutes of the power relay
being turned on.
DC277V-374V
DC227V-374V
abnormally
Replace the CN13
cord.
Normal
Less than AC196V
or AC265V or more
AC196-265V
Block off the power source, and return the yellow
striped and blu striped wires to their former position.
Then remove the gray and red wire from the diode
stack. Connect the power source, and forcibly turn on
the cooling (clicking noise). Then check the DC
voltage between the gray and red wires within three
minutes of the power relay being turned on.
Less than DC10V
There is a diode stack abnormally.
Replace the diode stack.
* 1 The power relay does not turn on without an operation order. In
the case of a abnormally stop, the power relay turns off after
approximately three minutes.
* 2 Carry out each of the voltage checks in the three minutes
between the power relay turning on and turning off.
– 83 –
The power relay
is off. Replace the
control power
circuit.