031-331-B1-001, Rev. A (11/2015)
031-331-B1-001, Rev. A (11/2015)
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11
Charge Control / Load Control
LEDs on the SmartHarvest
TM
SCCM20-100 Charge Controller indicate battery state, operational status and alarm conditions as
indicated in the table below.
Indications/Alarms, SmartHarvest SCCM20-100 Charge Controller
SmartHarvest SCCM20-100 LED Indicators
Load LED
(Red)
Solid
Load disconnected
Slow flash
Battery load critical – Charge < 20%
Off
OK – no error
Battery LED
(Yellow)
Solid
Battery charge >90%
Slow flash
Battery charge >50%
Rapid flash
Battery charge <50%
Off
Battery critical < 20%
PV LED
(Green)
Solid
PV present
Slow flash
Battery charging
Off
No PV present
Troubleshooting
Problem
Possible remedies (perform in order shown)
Battery not charging
1) Check battery connections
2) Check PV voltage and connections
3) Check breakers.
4.) Allow charger to cool
No LED indicators with PV power available
1) Check battery voltage at controller terminals
2) Check panel voltage at controller terminals
Red LED on
1) Disconnect load
2) Disconnect PV
3) Disconnect battery
4) Reconnect battery
5) Reconnect PV
6) Reconnect load
Red LED flashing
1) Disconnect loads
2) Recharge battery
Yellow LED not on
Charge battery
Charging to wrong voltage
1) Check position of battery selection jumper
2) Check installation of thermistor
Load not powered
Check minimum load for charge controller
System Shutdown, SmartHarvest
SCCM20-100
Charge Controller
1. Open the Load output breaker.
2. Open the PV input breaker.
3. Open the master DC circuit breaker.
4. Open any connected battery breakers.
5. Measure across the Load positive (+) and Load negative (–) terminals on the charge controller. Verify a reading of 0 Vdc, indicating
the system is offline.
A
B
C
A
PV module circuit breaker
B
DC bus master breaker
C
Load output circuit breaker
WARNING: Electrical Hazard
Prior to beginning the shutdown procedure, cover the PV modules with opaque material to prevent the conversion of light energy
into DC power.
CAUTION: Hazard to Equipment
Opening the battery breakers before opening the PV or load breaker will damage the charge controller.
CAUTION: Hazard to Equipment
The master battery breaker must be opened during periods of no solar input that extend beyond the rated 3 day blackout
autonomy e.g. solar panel service, prolonged snow cover, debris build up on panel. Failure to either recharge the batteries or open
the master battery breaker during an extended outage may result in permanent damage to the batteries.
