Activation Of High Pressure Switch (Psh 1~6) - Hitachi RCUE40AG1-400AG1 Service Manual

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] ~ [] Activation of high pressure switch (PSH
!
This alarm code is indicated when the discharge pressure is higher than 2.74 Mpa.
Is alarm activated just after
running?
Is alarm activated in 3
minutes after running
operation?
Is high pressure
switch (PSH1~6) reset
button activated?
Is 220-240V the voltage
between connector PCN203
PIN1 and connector PCN 203
PIN3 on the Printed Circuit Board
for Relay (PCB
Check Printed Circuit
Board for Relay ( PCB

NOTE:
To check the nominal value for pressure refer to safety and control device setting table to the technical catalogue
Yes
(Activate
immediately)
No (Activate
after a while)
No (Activate a while
after Compressor ON)
Yes
No
Reset
Yes
No
Wiring Check
1~6)?
D
Yes
1~6)
D
)
1~6
Is 220-240V the voltage
between connector
Yes
PCN203 PIN1 and
connector PCN 203
PIN3 on the Printed
Circuit Board for Relay
(PCB 1~6)?
D
No
Yes
(PCB is
normal)
Is high pressure switch
(PSH1~6) activated?
No
Is 220-240V the voltage
between connector
PCN203 PIN1and
No
connector PCN 203
PIN3 on the Printed
Circuit Board for Relay
(PCB 1~6)?
D
Yes
PCB Check
D
Wiring Check
(breaking of wire,
wrong wiring)
Check clogging
in air side heat
exchanger
High Pressure
Check
Cycle Check
Wiring check
(breaking of wire,
wrong wiring)
Check Printed
Circuit Board for
Relay (PCB 1~6)
D