Advertisement
7
Water to Water Heat Pump (WTW)
Error Codes (C.B.)
Code
Error
None
―
63H connector open
Abnormal if 63H connector circuit
is open for 3 minutes continuously
F5
after power supply.
(5201)
63H: High pressure switch
High pressure (High pressure
switch 63H operated)
Abnormal if high pressure switch
63H operated (4.15 MPa) during
compressor operation.
63H: High pressure switch
U1
(1302)
B-260
Cause
No voltage is supplied to terminal block
(TB1) of heat pump unit.
a) Power supply breaker is turned off.
b) Contact failure or disconnection of
power supply terminal
c) Open phase (L or N phase)
Electric power is not charged to power
supply terminal of power circuit board.
a) Contact failure of power supply ter-
minal
b) Open phase on the power circuit
board
Electric power is not supplied to C.B.
a) Disconnection of connector (CNDC)
Disconnection of reactor (ACL)
Disconnection of noise filter circuit
board or parts failure in noise filter
circuit board
Defective power circuit board
Defective C.B.
Brine pump manual operation
Disconnection of wire between UNIT
SIDE and MODULE SIDE.
Disconnection or contact failure of 63H
connector on C.B.
Disconnection or contact failure of 63H
63H is working due to defective parts.
Defective C.B.
Clogged or broken pipe
Locked brine pump
Malfunction of brine pump
Short cycle of refrigerant or brine cir-
cuit
Dirt of brine circuit heat exchanger
Decreased brine flow rate
Disconnection or contact failure of con-
nector (63H) on C.B.
Disconnection or contact failure of 63H
connection
Defective C.B.
Defective action of linear expansion
valve
Malfunction of brine pump driving cir-
cuit
Action
Check following items.
a) Power supply breaker
b) Connection of power supply terminal
block (TB1)
c) Connection of power supply terminal
block (TB1)
Check following items.
a) Connection of power supply terminal
block (TB1)
b) Connection of terminal on power cir-
cuit board
Check connection of the connector
LI or NI.
Check connection of the connector
(CNDC) on the C.B.
Check connection of the connector,
CNDC on the noise filter.
Check connection of reactor. (ACL)
a) Check connection of noise filter cir-
cuit board.
b) Replace noise filter circuit board.
Replace power circuit board.
Replace C.B. (When items above are
checked but the units cannot be re-
paired).
Check DIP SW6-3 and turn it OFF.
Refer to 'How to remove the module'.
Check connection of the wire between
UNIT SIDE and MODULE SIDE.
Check connection of 63H connector on
C.B.
Check the 63H side of connecting wire.
Check continuity by tester.
Replace the parts if the parts are defec-
tive.
Replace C.B.
Check piping and repair defect.
-
Check heat pump unit and repair defect.
Check the brine flow rate.
-
Turn the power off and check F5 is
displayed when the power is turned
again.
Check linear expansion valve.
Replace C.B.
Advertisement
