Idea ISW-10 SF1-DN1, Installation Manual, Page: 63 / 66

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heat exchange;
P9
Low-pressure switch
disconnect protection
1. Insufficient refrigerant;
2. The evaporator is
blocked or the fin surface is
dirty;
3. The low pressure switch
is broken;
1. Inject suitable refrigerant .
2. Clean evaporator
3.Replace of low pressure switch .
P1
High pressure is too
high protection under
cooling mode The machine is dirty and
blocked ,affecting heat
exchanger
Check the system for
troubleshooting;
LC
Communication
failure between main
board and
compressor drive
1.Communication wiring
between compressor drive
and main board is loose or
broken;
2. The drive terminal or
main board terminal
connection position is not
selected correctly;
3.Compressor drive is
damaged and not powered
on.
1. Check whether the connection
position of the communication
cable at both ends of the driver and
the main control board is correct;
2. Check whether the
communication wiring is broken or
loose. If so, replace the
communication cable;
3.Check whether the compressor
drive is powered on normally (the
LED will flash when the
compressor drive is working
normally);
C4
Discharge temp Td is
too high protection
1.Insufficient refrigerant;
2.The system is blocked;
3.The compressor is worn;
1.System leak detection and repair
and charge refrigerant according to
parameters;
2.Check the system for
troubleshooting;
3.Replace the compressor;
C7
Exhaust overheating
is too low protection / /
Y3 DC motor 1 fault
1. The DC motor line is
damaged;
2. The DC motor is blocked
and causes stall;
3.Main board is damaged;
1. Check whether the DC motor
wiring is correct and whether it is
disconnected;
2. Check whether the fan of the DC
motor is stuck and whether it can
turn normally, otherwise change
the fan;
3.Change the main board
H5 Four way valve fault
1. The four-way valve is
incorrectly connected to the
main controller;
2. The four-way valve is
disconnected;
3. The parameters are not
set correctly;
1. Check whether the four-way
valve is connected correctly and
whether it is disconnected;
2.Check whether the No. 13
parameter of the remote controller
is set correctly;
b9
Drive IPM over
temperature
protection
1. The fan is not working
properly;
2. Poor heat dissipation
due to dirty blockage of
external machine fins;
3.The drive module is
damaged;
1. Check if the fan is working
normally;
2. Clean up the external fins;
3. Replace the drive module;
b5
Drive input
overcurrent
protection
1. When reporting B6, the
input voltage is abnormal
and wait for the power grid
1. When reporting B6, if the power
grid is normal, replace the drive;