Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 45

(4) Phenomenon observed after shortcircuit, wire breakage on thermistor.
(a) Indoor unit
Operation
Sensor
mode
Cooling
Room temperature
thermistor
Heating
Cooling
Heat exchanger
thermistor
Heating
(b) Outdoor unit
Operation
Thermistor
mode
Cooling
Heat exchanger
pipe thermistor
Heating
Cooling
External temperature
thermistor
Heating
Discharge pipe
All modes
(Comp. dome)
thermistor
(5) How to make sure of remote controller
(1)
Is remote
NO
controller
normal?
YES
Again pushing
operating switch
YES
Operating the unit?
NO
Does backup
switch operates?
YES
Operating the unit.
NO
Control problem on
main unit
Shortcircuit
Release of continuous compressor operation command
Continuous compressor operation command is not released.
System can be operated normally.
High pressure control mode (Inverter stop command)
Shortcircuit
System can be operated normally.
Defrosting is not performed.
System can be operated normally.
Defrosting is not operated.
Compressor overload protection is disabled.
(Can be operated.)
Remote controller
defects
Abnormality is not
found.
Replace the display.
Is the unit
YES
operable with remote
controller?
NO
Defective remote
controller
Phenomenon
Continuous compressor operation command is not released.
Release of continuous compressor operation command
Continuous compressor operation command is not released.
(Anti-frosting)
Hot keep (Indoor fan stop)
Phenomenon
System can be operated normally.
Defrosting is performed for 10 minutes at approx. 1 hour.
Defrosting is performed for 10 minutes at intervals of approx. 1 hour.
Compressor stop (There is no inverter output.)
Note (1) Check method of remote controller
(a) Press the reset switch of the remote controller.
(b) If all LCD are displayed after zero (0) display, it is basi-
cally normal.
CONT HI POWER ECONO
AUTO
HI
MED
LO
Normal
SRK-GZ
Broken wire
Broken wire
ON OFF TIMER
43