Installation manual

[ IX Troubleshooting ]
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HWE10050 GB
3) Pulse signal output and valve operation
4) LEV valve closing and opening operation
Output state
Output
(phase)
number
1234
1 ON OFF OFF ON
2 ON ON OFF OFF
3 OFF ON ON OFF
4 OFF OFF ON ON
Output pulses change in the following orders when the
Valve is closed; 1 2 3 4 1
V
alve is open;
4 3 2 1 4
*1. When the LEV opening angle does not change,
all the output phases will be off.
*2. When the output is open phase or remains ON,
the motor cannot run smoothly, and rattles and vibrates.
*Upon power on, the indoor unit circuit board sends certain types of pulse
signals to certain types of LEVs to determine the valve position and always
brings the valve to the position as indicated by A in the diagram.
・
2200 Hz pulse signal to the indoor unit LEV, BC controller LEV1 (G1 type only), and LEV3
・3200 Hz pulse signal to the BC controller LEV1 (GA1 and HA1 types only).
When the valve operates smoothly, no sound from LEV or no vibration
occurs, however, when the pulses change from E to A in the chart or
the valve is locked, a big sound occurs.
*Whether a sound is generated or not can be determined by
holding a screwdriver against it, then placing your ear against the handle.
*1 The LEV opening may become greater depending on the operation status.
.
1400 pulses (Indoor unit LEV, and BC controller LEV1 (G1 type only) and LEV3) *1
.
2100 pulses (BC controller LEV1 (Applicable only to the GA1 and HA1 types.)) *1
Valve opening (refrigerant flow rate)
Valve closed
Valve open
E
B
80 - 100 pulses
Pulses
Fully open
A
C
D