Question about Orbit Hydro-Rain HRC-100-04-NA 4 Station Ind/Out Controller

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Hello everyone. I have a hydro-rain timer hrc 100 that it won't start the sprinklers at all n it says "OFF POWER". Would anybody know if this issue can be fixed some how? Please let me know. Thanks much!

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Yes, plug the timer in.

Posted on Apr 24, 2014


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Posted on Jan 02, 2017


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Why does on my hydro rain timer it says power off when its still plugged in? non of the sprinklers go on

Diconnect all power to unit this allows the unit to reset includes battery .After reset check/you may have a shrt circurt in the systen

Aug 19, 2014 | Orbit Hydro-Rain HRM-100-03-BD HRM 100...

2 Answers

Hydro Rain hrc 100 says NO AC

Could be many problems with a description as vague as "not working." Can you be more specific? Does no water come on? Does the timer say it is operating? Is it plugged in? Does outlet have power? Are wires connected correctly? Can you start a zone using the bleeder screw?

Mar 28, 2014 | Orbit Hydro-Rain HRC-100-04-NA 4 Station...

1 Answer

Circuitry from fuse box (220v) to timer and to sprinkler pump 220v

Copy following link:
240Volt requires 2 hot wires, but not additional neutral wire. Just cap the neutral.
The rain sensor should have it's own power source (for example plug into outlet, or use 1 Hot and 1 Neutral to supply power to rain sensor), and then wires from rain sensor connect to two rain-sensor terminals located on timer.
Do not connect power directly the the rain sensor terminals.
Add a comment for followup.

Jun 29, 2013 | Hardware & Accessories

1 Answer

Can I connect a rain guage to a intermatic T8805P101C sprinkler clock?

1) Not directly to timer, because the T8805P101C 125Volt sprinkler/irrigation timer does not have additional wiring terminals for rain sensor.

2) Buy R8815P101 125Volt timer has additional terminals for sensor.

3) If you are good at wiring projects: Then you can wire rain sensor to 24Volt 8-pin relay, and have relay open and close power to pump or sprinkler head.

4) Open following link for sprinkler timer resources:

Add a comment for more help

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For a price, expert works with you while you work on timer or any do-it-yourself project.
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Sep 16, 2011 | Intermatic & Indoor/Outdoor Rain Tight...

1 Answer

How to wire hunter rain clik rain sensor to r8816p101c

1) There are different rain clik model numbers shown in manual
Open 24 volt Rain clik manual:

2) The rain sensor has two wires.
And two additional wires are needed to run from rain sensor to sprinkler timer. For example, buy thermostat wire from local hardware store if wire is not supplied.

3) The rain sensor has a terminal block where wires are connected. .
Open manual above to identify markings on your terminal block.
For example Figure 1 shows SRC model, and with this model number, the rain sensor wires connect to terminals RS and C, and then two wires going to timer connect to terminals RS and and 1.

4) R8816P101C is 208-240Volt 24-hour irrigation timer.
Timer has two separate terminals for attaching rain sensor.

5) Timer power connections have 4 terminals. Do not connect rain sensor to power terminals.
Connect wires from sensor to the two sensor terminals.

6) Timer slide-switch must be set to ON position for rain sensor operation.
Sensor sends continuous 24Volts to irrigation timer.
When it rains, the rain sensor stops sending 24Volts to timer. Timer responds by not turning on power to irrigation pump.
To by-pass rain sensor, move timer slide-switch to off position.

7) Open following link for Intermatic replacement parts:

8) Take a moment and rate answer:
And take advantage of fixya expert assistance live.
For a price, expert works with you while you work on timer or any do-it-yourself project.
Fixya is always less expensive than a service call.

Sep 05, 2011 | Intermatic R8816P101C -...

1 Answer

How do you wire a Toro Rain Sensor 53769 to Intermatic Timer T8845PV

The rain sensor only connects to Intermatic sprinkler timer IF the timer has the rain sensor terminals.
Not all Intermatic sprinkler timers have that connection.
For example R8815P101C and R8816P101C have rain sensor terminals

I think the rain sensor terminals are located to the right of main wiring terminal block.
There are two screw terminals.

The rain sensor plugs into a power source, and then sensor wires connect to the timer.
Apply no voltage to the sprinkler timer terminals.

May 01, 2011 | Intermatic & Indoor/Outdoor Rain Tight...

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