Yaskawa iQpump Manual Supplement - Manual (Page 23)

8 Geothermal Mode
YASKAWA TM.iQp.10 iQpump Technical Manual Supplement 23
„ Geothermal Mode iQpump Controller Monitors
U1-80 Geothermal Temperature Input
Note: Only shown when b1-05 = 5 (Geothermal Mode)
„ Geothermal Temperature Loss Detection
P4-39 Geothermal Temperature Loss Detection
Selects iQpump Controller action when the temperature sensor signal from Terminal A2 is below 3 mA or above 21 mA.
Note: Only effective when H3-08 = 2 (4-20 mA) and H3-09 = 20 (Geothermal Temp).
Alarm: Temperature Sensor Lost (factory default)
Alarm: Geothermal Parameters Programming Error
Fault: Temperature Sensor Lost
Unit Description
0.1 °F
Displays Geothermal temperature input after gain and bias are applied. This is the temperature used by the
Geothermal Function to determine what frequency to run the iQpump Controller.
Setting Description
0 Disabled
1 Alarm (factory default)
2 Fault
Alarm Display Description
Temp Lost
Geothermal Input
The geothermal temperature sensor is not present. Alarm occurs when:
1. b1-01 = 5, H3-09 = 20 (Geothermal Temp), H3-08 = 2 (4-20 mA), P4-39 = 1 (Alarm), and the input has
either dropped below 3 mA or went above 21 mA.
Check: Ensure the device connected to Terminal A2 is installed and working properly.
2. b1-01 = 5, and H3-09
≠ 20 (Geothermal Temp), and P4-39 = 1 (Alarm).
Check: Terminal A2 must be assigned to Geothermal Temp (H3-09 = 20).
3. b1-01 = 5, H3-09 = 20 (Geothermal Temp), H3-08 = 2 (4-20 mA), P4-39 = 2 (Fault), the drive is either
in HAND mode or has no run command, and the input is below 3 mA or above 21 mA.
Check: Ensure the device connected to Terminal A2 is installed and working properly.
4. b1-01 = 5, and H3-09
≠ 20 (Geothermal Temp), P4-39 = 2 (Fault), and the drive is either in HAND mode
or has no run command.
Check: Terminal A2 needs to be assigned to Geothermal Temp (H3-09=20).
Alarm Display Description
Geo Params
Check P4-35~P4-38
The drive is running at the P4-31 level because of an incorrect setting.
The temperature parameter values must be set in the following order:
P4-35 < P4-36 < P4-37 < P4-38
Fault Display Description
Temp Lost
Geothermal Input
The geothermal temperature sensor is not present. Fault occurs when:
1.b1-01 = 5, and H3-09 ≠ 20 (Geothermal Temp), and P4-39 = 2 (Fault).
Check: Terminal A2 must be assigned to Geothermal Temp (H3-09 = 20).
2.b1-01 = 5, H3-09 = 20 (Geothermal Temp), H3-08 = 2 (4-20 mA), P4-39 = 2 (Fault), the drive is either in
HAND mode or has no run command, and the input is below 3 mA or above 21 mA.
Check: Ensure the device connected to Terminal A2 is installed and working properly.