Hitachi RAS-(3-6)HVNC1(E) Service Manual page 236

8 Troubleshooting
02
Alarm code
- This alarm is indicated when one of safety devices is activated during compressor running.
Is the con-
No
nector for PCN8
correctly
connected?
Yes
Is there the
continuity between
terminals #1 and #3 of con-
nector PCN8 during
operation stop?
(Y52C: OFF)
Yes
Does CMC
turn ON when
starting?
Yes
Does CMC
No
turn ON for
more than 3
seconds?
Yes
Normal O.U. PCB1
Check activation of the following safety devices.
Remove the cause after checking.
PSH: 4.15MPa (R410A)
222
SMGB0087 rev.0 - 12/2013
Activation of the safety device in the outdoor unit
(Except RAS-(2/2.5)HVNP1 and RAS-3HVNC1)
Is faston
No
terminals for
PSH connected
correctly?
Yes
Is the voltage
between #1-#3
No
of PCN9 220V or
240V during
operation?
(Y52C: ON)
Yes
Check the
Good
coil for CMC
Plug connector correctly
No
Plug flaston terminals to
PSH correctly
Check activation of the
following safety devices.
Faulty O.U. PCB1
Remove the cause after
PSH: 4.15MPa (R410)
Is the
No protective
device still op-
eratin?
Yes
Is the A
contact of
CMC
activated?
No
Faulty
checking.
No
Faulty O.U. PCB1
Yes
Faulty O.U. PCB1
Faulty CMC