7
9. Troubleshooting the error codes:
Listed below are potential diagnostic error codes which will appear on the LCD display in case of a malfunction.
Testing the Sensors
A good quality test meter capable of measuring up to 5,000 k
Ω
(1 k
Ω
= 1000
Ω
) is required to measure the sensor resistance. In
addition to this, the actual temperature must be measured with a good quality digital thermometer.
First measure the temperature using the thermometer and then measure the resistance of the sensor at the Bumble Bee. The wires
from the sensor must not be connected to the circulator while this test is performed. The wiring terminals are easily removed by
pulling them from the circulator. Using the chart below, estimate the temperature measured by the sensor. The sensor and ther-
mometer readings should be close. If the test meter reads a very high resistance, there may be a broken wire, a poor wiring con-
nection or a defective sensor. If the resistance is very low, the wiring may be shorted, there may be moisture in the sensor or the
sensor may be defective. To test for a defective sensor, measure the resistance directly at the sensor location.
ERROR CODE*
DESCRIPTION
CORRECTIVE ACTION
SENSOR 1 MISSING
Supply sensor disconnected.
Reconnect sensor.
SENSOR 2 MISSING
Return sensor disconnected.
Reconnect sensor.
SENSOR 1 SHORTED
Bad sensor.
Replace sensor.
SENSOR 2 SHORTED
Bad sensor.
Replace sensor.
AC INPUT UNDER VOLTAGE
Low voltage problem.
Check power supply.
AC INPUT OVER VOLTAGE
High voltage problem.
Check power supply.
LOCKED ROTOR
Probable locked rotor or motor failure.
Replace pump.
MOTOR OVER CURRENT
Possible locked rotor.
Replace pump.
OVER TEMPERATURE
PC Board overheating.
Pump will reduce current and speed until PCB tem-
perature is acceptable. If speed falls below 1650
RPM, pump will stop on safety. Cycle AC power
OFF/ON to restart.
*
Flashing Displayed on LCD
SPEED
TACO
GRUNDFOS
WILO
B & G/XYLEM
ARMSTRONG
1
003
-
-
-
-
2
006
-
-
-
Compass-1
3
007
008
0015-1
0015-2
UP-15-42
UPS-15-58-1
UPS-15-58-2
Star S-21-1
Star S-21-2
NRF-25-1
NRF-25-2
Astro 230-1
Astro 230-2
Compass-2
4
0015-3
UPS-15-58-3
Star S-21-3
NRF-25-3
Eco-Vario
Astro 230-3
Compass-3
Pump Cross Reference (Constant Speed Mode):
Temperature
Resistance
Temperature
Resistance
Temperature
Resistance
Temperature
Resistance
°F
°C
Ω
°F
°C
Ω
°F
°C
Ω
°F
°C
Ω
-30
-34
234,196
30
-1
34,558
90
32
7,334
150
66
2,045
-20
-29
165,180
40
4
26,099
100
38
5,828
160
71
1,689
-10
-23
118,018
50
10
19,900
110
43
4,665
170
77
1,403
0
-18
85,362
60
16
15,311
120
49
3,760
180
82
1,172
10
-12
62,465
70
21
11,883
130
54
3,050
190
88
983
20
-7
46,218
80
27
9,299
140
60
2,490
200
93
829
MODE
TACO
GRUNDFOS
WILO
B & G/XYLEM
ARMSTRONG
Delta-T
008-VDT
Alpha 15-55
Stratos Eco
Eco-Auto
Compass
Pump Cross Reference (Delta-T Mode):
