Test Operation
SiENBE28-901
72
Air Cooled Refrigeration Condensing Unit
Error diagnosis
If the system cannot operate normal at the time of test run (i.e., the H2P indicator is lit),
check with malfunction code on the system with the pushbutton switches on the PCB of the
outdoor unit, and take the following steps.
Make checks on other malfunction codes and pushbutton switches by referring to the
provided Technical Guide.
h
OFF
k
ON
l
BLINK
*1
Set the operating switch to the “OFF” position to reset the power supply and then return the
switch to the “ON” position to restart the unit. If the problem persists, refer to the Service
Manual.
Caution
Do not disconnect the power supply for 1 minute after setting the operating switch to “ON”.
Electric leak detection is performed for several seconds after the operating switch is set to
“ON” and each compressor starts operating, so disconnecting the power supply during that
time will result in a false detection.
LED indication
Installation
failure
Remedy
(BS3 switch pressed once)
(BS2 switch pressed once)
H1P H2P H3P H4P H5P H6P H7P H1P H2P H3P H4P H5P H6P H7P
l h k h h l
l
l k h h h l
l
The shutoff
valves were left
closed.
Fully open the
shutoff valves.
or
l k h h l h h
l h k h l
l
l
l k h h l h h
The passage of
air is blocked.
Remove obstacles that
block the passage of air.
l h k l h h l
l k h h h h l
Reverse-phase wiring
of power supply
Exchange two wires out of
the three power supply wires.
l h k l h h l
l k h h h l h
Voltage drop
Make a voltage
drop check.
l h k h l
l
l
l k h l h h l
l h k h h l
l
l k h h h l h
Electric leak
See *1 below.
l h k h l
l
l
l k h l
l h h
Open L2 phase
Verify power
supply wiring
connections.
l h k h l h h l k h h h l
l
Normal monitor (HAP) LED off.
Open L1 phase
