Error Code Check Table; Pump Down; Preparation For Pump Down; Pump Down Procedure - Fujitsu WOYK150LJL Installation Manual

12.2. Error code check table

Number of
blinks (LED)
1 Serial forward transfer error
2 Discharge thermistor error
3 Pressure sensor error
4 Heat-exchange thermistor (outlet) error
Heat-exchange thermistor (intermediate)
5
error
6 Expansion valve thermistor error
7 Outdoor temperature thermistor error
8 Compressor thermistor error
9 Heatsink thermistor (inverter) error
10 Heatsink thermistor (P.F.C.) error
Discharge temperature protection
11
(permanent stoppage)
Compressor temperature protection
12
(permanent stoppage)
13 Current trip (permanent stoppage)
Detection of compressor position error
14
(permanent stoppage)
Compressor start up error (permanent
15
stoppage)
16 Fan motor (1) error (permanent stoppage)
17 Fan motor (2) error (permanent stoppage)
18 Inverter error
19 P.F.C. error
20 Low pressure abnormal
21 Connection with indoor unit error
22 Indoor unit abnormality condition
23 Discharge (high pressure) pressure sensor error
24 Suction (low pressure) pressure sensor error
Error type

13. PUMP DOWN

WARNING
Never touch electrical components such as the terminal blocks except the button on
the display board. It may cause a serious accident such as electric shock.
During the pump-down operation, make sure that the compressor is turned off before
you remove the refrigerant piping.
Do not remove the connection pipe while the compressor is in operation with 2-way or
3-way valve open. This may cause abnormal pressure in the refrigeration cycle that
leads to breakage and even injury.
CAUTION
Perform the pump down operation before disconnecting any refrigerant pipe or electric
cable.
Collect refrigerant from the service port or the 3-way valve if pump down cannot be
performed.
In case of a group control system installation, do not turn the power off until pump down
is completed in all outdoor units.
(Group control system installation described in "SPECIAL INSTALLATION METHODS"
in the installation manual of the indoor unit.)
• Operate [PUMP DOWN] button on the display board in the manner described
below.
LED display part
/
SW107 SW108 SW109 SW112 SW110

13.1. Preparation for pump down

• Confi rm that the power is off, and then open the service panel.

13.2. Pump down procedure

(1) Check the 3-way valves (both the liquid side and gas side) are opened.
(2) Turn the power on.
PUMP
POWER/
ERROR
DOWN
MODE
(L1)
● ○ ○
○ ●
Sign " ": Lights off, " ": Lights on
(3) Press [PUMP DOWN] button for 3 seconds or more after 3 minutes after power on.
PUMP
POWER/
ERROR
DOWN
MODE
(L1)
● ○ ●
○ ●
Sign " ": Lights off, " ": Lights on
LED display lights on as shown in the above fi gure, and the fans and the
compressor start operating.
• If the [PUMP DOWN] button is pressed while the compressor is operating, the
compressor will stop, then start again in about 3 minutes.
(4) LED display will change as shown below about 3 minutes after the compressor
starts. Fully close the 3-way valve on the liquid pipe side at this stage.
PUMP
POWER/
ERROR
DOWN
MODE
(L1)
● ○ ●
○ ●
Sign " ": Lights off, " ": Lights on
• If the valve on the liquid pipe side is not closed, the pump down cannot be performed.
Button part
LOW PEAK
NOISE CUT
(L2) (L3) (L4) (L5)
○ ○ ○ ○
LOW PEAK
NOISE CUT
(L2) (L3) (L4) (L5)
○ ○ ● ●
LOW PEAK
NOISE CUT
(L2) (L3) (L4) (L5)
○ ○ ○ ●
(L6)
○
(L6)
●
(L6)
●
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