SM-18006
3-129
TROUBLESHOOTING
NOTE:
There might be the possibility that the refrigerant recovery work for water source unit (when exchange the
cycle parts of water source unit, etc.) is not successfully completed if not activate the “Forced Open Valve
Mode”. Make sure to activate this mode when conduct refrigerant recovery work for water source unit.
(1) Applicable Unit
Water Source Unit (Main Water Source Unit: Unit A)
(2) Setting Procedure
Turn ON the DIP4 - #4 of the main water source unit (unit A) and press PSW4 (▼) for 3 seconds.
When this mode is activated, “oPEn” is indicated on the 7-segment display of the water source unit.
Figure 3.5 Indication "oPEn" on 7-Segment Display
(3) Cancellation
Turn OFF the DIP4 - #4 of the main water source unit (unit A).
Make sure the indication “oPEn” on the 7-segment display is turned off after cancellation.
NOTES:
1. Make sure to cancel this mode after refrigerant recovery work, refrigerant evacuation work and air tight
test is completed.
2. The cooling operation (include dry operation), heating operation and fan operation for indoor unit are not
available during this mode is activated or for 50 seconds after cancellation (Stoppage Cause Code:
d1-10).
3. Make sure to turn ON the power supply of indoor unit and water source unit when activate this mode.
Expansion valve and solenoid valve are not activated if the units are not supplied with power.
4. The “Forced Open Valve Mode” will not function properly when expansion valve or solenoid valve is
failed.
5. DO NOT activate this mode for the objective other than refrigerant recovery work, refrigerant evacuation
work and air tight test.
Otherwise, it may cause unit failure because the operation is stopped by different from normal control.
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