Emergency Operation; Emergency Operation Of Controller - Daikin LXE10E-A14 Service Manual

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6.5 Emergency operation

6.5.1 Emergency operation of controller

In case of the controller malfunction, emergency operation can be executed by using emergency
operation kit.
(1) Components to be prepared (emergency operation kit)
Short circuit connector --- Stored on the back of CPU/IO board case in the control box.
Electronic expansion valve emergency cap --- Stored in the spare parts kit.
Suction modulating valve emergency magnet --- Stored in the spare parts kit.
(2) Procedure
q Circuit breaker OFF
Turn the circuit breaker in the control box off.
w Short circuit of controller
Connect the short circuit connector stored on the back of CPU/IO board case inside the control
box with the emergency pin on the terminal board.
For the details, refer to the section 6.5.2 "Short circuit procedure for controller".
e Emergency operation of electronic expansion valve
By using emergency cap, set the electronic expansion valve in fixed opening degree.
For the details, refer to the section 6.5.3 "Emergency operation of electronic expansion valve".
r Emergency operation of suction modulating valve
Fully open the suction modulating valve by turning the dip switch on adopter PCB on or by using
emergency magnet.
For the details, refer to the section 6.5.4 "Emergency operation of suction modulating valve".
t Circuit breaker ON
Turn the circuit breaker in the control box on to operate the unit.
(3) Operating condition at emergency
Temperature can not be controlled. Turn the circuit breaker on or off to maintain the target
temperature.
Mode
Cooling operation
Heat operation
Available function of
protection devices
RPP : Reverse phase protection
device
HPS : High pressure switch
CTP : Compressor thermal protector
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Operating condition of unit
Compressor runs continuously.
Evaporator fan runs at low speed
continuously.
Condenser fan runs continuously.
Electronic expansion valve
operates with fixed opening by the
emergency cap.
Suction modulating valve operates with
full opening by emergency magnet.
Compressor stops.
Evaporator fan runs at high speed
continuously.
Condenser fan stops.