Yaskawa iQpump Manual Supplement - Manual (Page 24)

8 Geothermal Mode
24 YASKAWA TM.iQp.10 iQpump Technical Manual Supplement
Fault: Geothermal Frequency Reference/Temperature Curve Error: OPE19
„ Example: Geothermal Pump System Transducer Setup
Geothermal Mode Setup Procedure:
Refer to Geothermal Mode Setup Procedure on page 20 for steps to setup the iQpump Controller for Geothermal Mode.
Fault Display Description
OPE19
Geothermal Set
Parameter selection is not compatible with the Geothermal Mode (b1-01 = 5) setting. Fault occurs when
b1-01 = 5 (Geothermal Mode), and one of the following is NOT set:
- b5-01 = 0 (PI Disabled)
- P1-01 = 0 (Simplex)
Check: Confirm parameter settings for b1-01, b5-01, and P1-01.
Example:
Geothermal Pump system using a temperature transducer 4 - 20 mA with a temperature range of 0 - 120 °F. The
system requires a minimum pump speed of 35 Hz. The system requires increased pump speed when the temperature
increases above 75 °F or when temperature falls below 65 °F.
60Hz
㩿㪧㪋㪄㪊㪋㪀
35Hz
㩿㪧㪋㪄㪊㪊㪀
55°F
㩿㪧㪋㪄㪊㪌㪀
65°F
㩿㪧㪋㪄㪊㪍㪀
Temperature (°F)
75°F
㩿㪧㪋㪄㪊㪎㪀
85°F
㪧㪋㪄㪊㪏㪀
Output
Temperature
Transducer
V+
A2
AC
+V
EG
iQpump
Output
V+
A2
AC
+V
EG
iQpump
Common
4-20mA
Temperature
Transducer
0-10V
Set S1-2 to OFF
O
F
F
1
2
Set S1-2 to ON
* Factory Default
O
F
F
1
2
Set parameter H3-08
Terminal A2 Signal to ‘0’
for 0 – 10V.