Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 358

FDT ( N ) -H
5 e 9
Error display :
Is there any
overflow?
NO
Is the float
switch tripped?
NO
Defective indoor unit PCB
ment (Defective DM driving output cir-
cuit, defective float switch input cir-
cuit)
6 e 10
Error display :
Are
17 or more unites
connected to 1 remote
controller?
NO
Remote controller defective
Replace
e 57
7
Error display :
Are the
(1)
heat exchanger
thermistor characteristic
normal?
NO
Defective heat exchanger
thermistor Replacement
Is the unit
normalized?
NO
Defective indoor unit PCB
Replacement (Defective
indoor unit heat exchanger
thermistor input circuit)
356
[Failure in drainage]
Is the angle of
YES
drain piping good. Is there
any problem?
YES
Repair or replace the
float switch
Replace-
[1 Remote controller for multiple unit control
units or more)]
YES
Change to 16 units or less.
[Insufficient refrigerant]
Inspect at the unit side.
YES Insufficient refrigerant
Note (1) Refer to previous page for heat exchanger thermistor heat resistance
characteristic values.
Defective indoor unit PCB
ment (Defective condensate motor output
circuit)
YES
for condensate motor
Repair
¡Check DM broken wire, burning, locking.
¡Are there any DM connector loose.
¡Are there any PCB faston terminal loose.
¡Are there any DM wire broken.
Note (1) Check if power source is there between DM connectors.
Exceeding connected units (17
Recharge with (weighed amount)
of refrigerant.
Replace-
NO
(1)
Is there output
(DM)?
YES
Inspect at the unit side.
During cooling
• Is indoor fan operating?
• Is the service valve (gas and
liquid side) opened fully?
• Is there no short circuit?