Hitachi RAS-(3-6)HVNC1(E) - Page 236

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