ROLA-CHEM RC554XXP User manual

ROLA-CHEM
®
Digital Controller PN 554326 06/28/19 Page: 1 of 24
Operating
Manual
MODEL RC554XXP
Dual ORP/pH Digital Controller
IMPORTANT SAFETY INSTRUCTIONS
READ AND FOLLOW ALL INSTRUCTIONS
SAVE THESE INSTRUCTIONS
pH ORP FLOW SWITCH pH OUTPUT ORP1 OUTPUT ORP2 OUTPUT POWER

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1. SAFETY: When installing and using this electrical equipment, basic safety precautions
should always be followed, including:
1.1 WARNING! To reduce the risk of injury, do not permit children to use this product unless they
are closely supervised at all times
1.2 WARNING! Risk of electric shock.
Connect only to a grounding type receptacle protected by a ground-fault circuit interrupter (GFCI).
Contact qualified electrician if you cannot verify that the receptacle is protected by a GFCI and that
your installation meets local electrical codes, including grounding of water system components.
1.3 WARNING! Risk of electric shock.
Do not bury electric cords. Locate cord to minimize abuse from lawn mowers, hedge trimmers, and
other equipment. Replace damaged cords immediately. Do not use extension cords.
1.4 WARNING! Risk of electric shock.
Install at least 10 feet (3.0m) from inside wall of water enclosure using non-metallic plumbing.
Do not install this controller in a location accessible to the public.
1.5 WARNING! Risk of Chemical Overdose/Exposure.
Removing power from circulating pump must also remove power from the controller.
Provide a properly located outlet controlled by the circulating pump circuit.
1.6 WARNING! Risk of electric shock/pinching/chemical exposure.
Remove power sources or lockout circuit prior to performing maintenance on controller.
1.7 WARNING! Risk of Chemical Overdose/Exposure
Use a device such as a flow switch to shut off power from the controller in the event of circulating
pump failure. It is unsafe to automatically dispense chemicals into a circulating system that is not
running.
1.8 WARNING! Risk of Chemical Exposure.
Pool water must be balanced and stabilized before operating this controller.
1.9 WARNING! Risk of Chemical Overdose/Exposure
Minimize the amount of chemical on site that is available to dispense.
Size the feeder and container to pool/spa capacity.
Dilute chemical for small bodies of water.
1.10 WARNING! Risk of Chemical Exposure
Do not shut down circulation and control system immediately after using pool, spa or hot tub.
Systems must operate until water chemistry is stable. Systems must be restarted before water
chemistry is out of NSPI recommended ranges or water chemistry must be manually corrected.
1.11 WARNING! Controller uses microprocessor.
Wireless communication equipment or other electrical devices operated in close proximity may
cause inadvertent actuation of chemical feed pumps.

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Table of Contents
Section title Page
1. Safety Instructions 2
2. Quick Start Reference 4
3. Description and Specifications
3.1 General Description 5
3.2 Specifications 6
3.3 Description of controls 8
4. Installation
4.1 Locating the controller 12
4.2 Mechanical installation 12
4.3 Power panel access 13
4.3.1 Dip switches 13
4.3.2 Fuses 13
4.3.3 Flow switch 14
4.3.4 Globe Flowcell 14
5. Operation
5.1 Startup 15
5.2 pH settings 15
5.3 pH Calibration 15
5.4 ORP settings 16
5.5 Operating mode 16
6. Troubleshooting 17
7. Warranty 19
8. Appendix
8.1 Dip switch settings 20
8.2 Factory default settings 21
8.3 Water chemistry ranges-NSPI 21
8.4 Typical system installations 22

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2. Quick Start Reference
Use this section for reference. Please read all safety instructions and appropriate manual
sections for installation and operation instructions.
 Do NOT add chemicals to feeders until all startup operations are completed.
 Manually adjust and balance pool/spa to acceptable levels and verify using DPD test kit
prior to startup. Automation should be used to maintain chemical levels, not to balance a
pool/spa that is out of acceptable chemical ranges.
On/Off:
- Press the MODE button to turn the unit on. Note: ‘FLOW’ light must illuminate.
- To turn the unit off press and release MODE button to change to ORP or pH mode. Then
press and hold the MODE button. “OFF” will be displayed in the windows.
To Operate:
- Press and release the MODE button until the “AUTO” LED is lit.
- Unit will now operate in the factory preset settings:
- Set levels: ORP1 = 650 mV, ORP2= 640 mV, pH = 7.4
- Feed times: ORP1 & pH = 0.6 second feed with a 5-minute delay, ORP2 = OFF
- Alert Limits: ORP1= 900 high & 100 low, pH= 8.0 high & 7.0 low
Note: ORP2 limits controlled by ORP1
To Change Settings:
Press and release the MODE button until the desired ORP1, ORP2 or pH LED is lit. Once
the settings are changed, they will remain at those settings until they are changed again.
- Set level: press the SET LEVEL button until the desired set point is reached.
Release the button.
- Feed time: press the FEED TIME button until the desired feed time is reached.
Release the button.
The numbers represent the seconds of feed time (all with 5-minute delays).
Range is 0.6 to 900 sec. (15 min.). Continuous feed is ‘con’.
- High alert: press the HIGH ALERT button until the desired level is reached. Release the
button.
- Low alert: press the LOW ALERT button until the desired level is reached. Release the
button.
- Consecutive Feed Alert Limit: See Appendix for adjusting limit.
Manual Feed:
- Press and release the MODE button to light the LED associated with the desired feeder to
be manually fed: ORP1, ORP2 or pH.
- Press the FEED ONCE button. The desired feeder will go through one “set feed” time cycle.
There is no manual feed option when the unit is in Continuous feed or off.
Other: See the appropriate manual sections for:
- Calibrating the pH sensor – See section 5.3
- Changing dip switches (pH/ORP interlock, Consecutive Feed Alert Limit and acid/base
chemical feed). – See Appendix section 8.1

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3. Description and Specifications
3.1 General Description
The controller is a microprocessor-based chemical automation system which continuously
monitors and maintains the pH balance and sanitizer level in a swimming pool or spa.
The Dual ORP/pH Digital Controller is intended to control two sanitizer sources, not two
bodies of water.
The pH and sanitizer level (ORP) are displayed using sun-bright seven-segment light emitting
diodes. The pH and ORP levels are continuously monitored and displayed on the controller’s
front panel. The ORP/pH controller has been designed to be user friendly. One MODE button
and six SET buttons allow the operator to easily set parameters.
The pH display range is 6.0 to 8.4 with a .1-unit resolution. The pH set point is adjustable
from 7.0 to 8.0 in .1 pH steps, with a factory default set point of 7.4 pH. During a pH feed
cycle, the pH feed lamp will flash when pH chemicals are being fed and illuminate
continuously during the feed delay portion of the feed cycle. The pH Alert lamp will illuminate
when the pH reading is higher or lower than the high and low pH Alert set points and prevent
the feeding of pH chemicals. The Digital Display numbers will flash and the pump/feeder will
not activate if the Set Level is not reached within the preset Consecutive Feed Alert Limit.
The default value is 40 cycles for timed feed mode or 40 minutes for continuous feed mode.
See appendix for setting Consecutive Feed Alert Limit.
The sanitizer (ORP) display range is 0 to 995 mV with a 5 mV display resolution. The ORP1
set point is adjustable from 400 to 900 mV, with default set point of 650 mV. The ORP2 set
point is adjustable from 400 to 890 mV, with default set point of 640 mV. The ORP2 will be
10mV or more below the ORP1.
During an ORP feed cycle, the ORP1 or ORP2 feed lamp will flash when sanitizer chemicals
are being fed and illuminate continuously during the feed delay portion of the feed cycle. The
ORP Alert lamp will illuminate when the ORP reading is higher or lower than the high and low
ORP Alert set points and prevent the feeding of sanitizer chemicals. The Digital Display
numbers will flash and the pump/feeder will not activate if the Set Level is not reached within
the preset Consecutive Feed Alert Limit. The default value is 40 cycles for timed feed mode
or 40 minutes for continuous feed mode. See appendix for setting Consecutive Feed Alert
Limit.
A manual feed cycle for pH or ORP can be started by pressing the MODE button (placing the
controller in stand-by mode for either pH, ORP1 or ORP2) and then pressing the FEED
ONCE button.
The feed cycle is a timed based ‘feed then delay’ system. The controller has a series of fixed
feed times (0.6 to 900 sec.) with associated delays as well as a Continuous feed mode. A
feed cycle consists of a feed time plus a delay time. Example: a 30 second feed time

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followed by a five-minute delay would have a 5½ minute feed cycle. The chemical feeder
dispenses chemical only during the feed time portion of the cycle and then waits for a delay
period to allow for chemical to dispense throughout the swimming pool or spa.
The controller incorporates an internal non-volatile memory in which all factory default
settings as well as field-modified settings are stored. The internal memory is not affected by
power interruption and requires no backup battery. Acid/base, pH/ORP interlock, and
Consecutive Feed Alert Limit switches are located behind the Power Panel Access Cover.
See section 4.3
The pH and ORP outputs are capable of handling 3.15 amps each at 120 Volt AC. The relay
outputs are fused and transient protected. An internal terminal strip is provided for field wiring
of the controller. The internal step-down transformer has a class-two energy limiting rating to
provide for electrical safety.
Note: When automating any body of water, it is essential to size the feeders to reach desired
levels in a relatively short period of time. Generally, automating an existing body of water with
existing feeders will require the output of the feeders be increased accordingly. If feeders are
unable to keep up with demand in a short period of time, automation becomes ineffective.
3.2 Specifications
Parameter Display Set Level Range Factory Default
pH: 6.0 to 8.4 7.0 to 8.0 7.4
ORP: 0 to 995 mV
ORP1: (5 mV increments) 400 mV to 900 mV 650mV
ORP2: (5 mV increments) 400 mV to 890 mV 640mV
Input Power:
120 Volts AC, 50/60 HZ, 3 wire grounded power cord.
Combined load not to exceed 10 amps.
GFCI source required
Output Power:
120 Volts AC, 50/60 HZ, ORP1, ORP2 and pH, 3.15 amps each (fused)
Two 3-wire grounded power receptacles
Terminal strip for hardwire applications (included)
Displays:
ORP and pH - red digital
Power and flow indicator - LED
Alert indicator & Feed indicator - LED (pH, ORP1& ORP2)
Mode indicator - LED (pH, ORP1, ORP2, Auto)
Note: feed lamps flash during the feed time and are on continuously during the delay time of the
feed cycle.
Operating Temperature: 40 to 120° F

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Selectable Features
+ ORP1& ORP2 settings + pH settings + Manual feed (Feed Once)
+ ORP1& ORP2 feed/delay times + pH feed/delay times + pH calibration
+ High & low ORP and pH alerts + Reset + ORP and pH Interlock
+ Acid/base feed + Adjustable Consecutive Feed Alert Limit
Features and Options
+ Flow switch input + Individually fused outputs + 120 VAC transformer

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3.3 Description of Controls
1- WATER FLOW LAMP
Illuminates brightly when water flow is indicated. Also indicates that power is on.
2- pH/ORP ALERT LAMPS
Illuminates red when the High or Low Alert levels are reached.
3- CHEMICAL FEED LAMPS
pH FEED lamp flashes while feeding chemical and illuminates continuously during feed
delay.
ORP1 & ORP2 FEED lamp flashes while feeding chemical and illuminates continuously
during feed delay.
4- pH/ORP DIGITAL DISPLAYS
Monitors pH and ORP and displays programmed set points.
The Digital Display numbers will flash if Consecutive Feed Alert Limit is exceeded.
5- pH STANDBY LAMP AND PROGRAMMING BUTTONS
When pH standby lamp is illuminated the six set buttons are enabled.
6- MODE BUTTON AND AUTOMATIC LAMP
Press MODE button to pH or ORP and then hold for 2 seconds for OFF.
Press and release MODE button to step from pH standby to ORP1 to ORP2 standby.
Press again to return to AUTOMATIC mode.
7- ORP STANDBY AND PROGRAMMING BUTTONS
When ORP1 lamp is illuminated the five SET buttons are enabled.
When ORP2 lamp is illuminated the three SET buttons are enabled.
8- pH/ORP SENSOR CONNECTORS - BNC type
pH ORP FLOW SWITCH pH OUTPUT ORP1 OUTPUT ORP2 OUTPUT POWER
23
4
5
6
7
8
1

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Modes: The controller has five modes of operation:
 ON/OFF mode.
 AUTO mode- normal operation mode
 pH - setting mode
 ORP1 - setting mode
 ORP2 - setting mode
To move from one mode to another simply press the MODE button.
The illuminated lamp indicates the current mode.
3.3.1 On/off mode:
 To turn the controller “ON” press the MODE button.
 To turn the controller “OFF” press and change MODE to pH or ORP and hold the MODE
button for two seconds until both displays read “OFF”. Release the MODE button and the
controller turns off and the displays go blank.
Note: Turning the controller “OFF” using the MODE button simply turns off the controller functions
but does not turn off the power to the controller. The ‘FLOW’ lamp located at the center of the
controller is both the power light and a flow indicator when an optional flow switch is used.
3.3.2 AUTO mode: This is normal operation mode. The controller operates the respective feeders
to automatically maintain the parameters set for both pH and ORP.
3.3.3 pH SET mode: This enables the six programming buttons to set the desired pH parameters.
Note: When scrolling through the set modes, to reverse the direction simply release the button
momentarily and press the button again.
Feed Once button: By pressing the FEED ONCE button, the pH feeder will feed and delay for
one complete feed cycle. See FEED TIME button for feed/delay times. If the Feed time is set
for “Continuous feed” the manual feed will not operate.
Set Level button: Pressing the SET LEVEL button once will display the current set level. To
change the set level, press and hold the SET LEVEL button (which displays in 0.1 pH
increments) until the desired level is reached.
Feed Time: The feed times are displayed in seconds.
Each feed cycle includes a five (5) minute delay time. Pressing the FEED TIME button allows
the user to scroll through the available feed times. Release the button when the desired pH
feed time is reached. To set the controller in Continuous feed, release the button when the
display reads “con”. Continuous feed runs feeder continuously; (1) until set point is reached or
(2) until Consecutive Feed Alert Limit is reached or (3) until High/Low Alert limit is reached.
See appendix for Consecutive Feed Alert Limit details. Feed time can also be set to “off”.
Note: The controller will overshoot the pH Set Level by 0.1 to reduce on/off cycles.
High Alert: Pressing the HIGH ALERT button allows the operator to set or turn off the High
Alert level feature. As the button is pressed the pH readout will scroll through the available
High Alert pH levels (7.5 to 8.4 and off). Release the button when the desired level is
reached. The High Alert cannot be turned off in the BASE feed selection.

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Low Alert: Pressing the LOW ALERT button allows the operator to set or turn off the Low
Alert level feature. As the button is pressed the pH readout will scroll through the available
Low Alert pH levels (6.8 to 7.4 and off). Release the button when the desired level is
reached. The Low Alert cannot be turned off in the ACID feed selection.
Note: If the pH reading is out of the pre-set alert range for more than ten (10) minutes the pH
red alert lamp will illuminate and the pH feeder will be disabled. The system will
automatically reset when the water chemistry has been corrected.
pH Calibrate: This button allows the operator to calibrate the pH sensor to a buffer or to a
sample tested with a test kit. Pressing the pH CALIB button allows the operator to adjust
the pH reading to match the buffer or test kit value.
Note: The sample to be tested should always be taken from the flow cell or container in which
the pH sensor is located. The pH calibration allows the adjustment of +/- 1 pH in .1 pH
increments.
Consecutive Feed Alert Limit: The Digital Display numbers will flash and the pump/feeder
will not activate if the Set Level is not reached within the preset Consecutive Feed Alert
Limit. See appendix for setting Consecutive Feed Alert Limit.
3.3.4 ORP1 SET mode: This enables the first five programming buttons to set the desired
ORP parameters.
Feed Once: By pressing the FEED ONCE button, the ORP feeder will feed and delay for one
complete feed cycle. See FEED TIME button for feed/delay times. If the feed time is set
for “Continuous feed” the manual feed will not operate.
Set Level: Pressing the SET LEVEL button once will display the current set level. To change
the set level, press and hold the SET LEVEL button (which displays in 5 mV increments)
until the desired level is reached.
Feed Time: The feed times are displayed in seconds. There is a five (5) minute delay time
associated with each feed time. Pressing the FEED TIME button allows the user to scroll
through the available feed times. Release the button when the desired ORP feed time is
reached. To set the controller in Continuous feed mode, release the button when the
display reads “con”. Continuous feed runs feeder continuously; (1) until set point is reached
or (2) until Consecutive Feed Alert Limit is reached or (3) until High/Low Alert limit is
reached. See appendix for Consecutive Feed Alert Limit details. Feed time can also be set
to “off”.
Note: The controller will overshoot the ORP Set Level by 10mV to reduce on/off cycles.
High Alert: Pressing the HIGH ALERT button allows the operator to set or turn off the High
Alert level feature. As the button is pressed the ORP readout will scroll through the

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available High Alert ORP levels (650 mV to 900mV, preset at 900 mV). Release the button
when the desired level is reached.
Low Alert: Pressing the LOW ALERT button allows the operator to set or turn off the Low
Alert level feature. As the button is pressed the ORP readout will scroll through the
available ORP levels (100 mV to 640 mV in 5 mV increments and “OFF”). Release the
button when the desired level is reached. The pH CALIB button is not functional in the
ORP mode.
Note: If the ORP reading is out of the pre-set alert range for more than ten (10) minutes the
ORP red alert lamp will illuminate and the ORP feeder will be disabled. The system will
automatically reset when the water chemistry has been corrected
Consecutive Feed Alert Limit: The Digital Display numbers will flash and the pump/feeder
will not activate if the Set Level is not reached within the preset Consecutive Feed Alert
Limit. See appendix for adjusting Limit.
3.3.5 ORP2 SET mode: This enables the first three programming buttons to set the desired
ORP parameters. ORP2 control parameters are the same as ORP1 except that ORP2 set
level will be 10mV or more below OPR1.

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4. Installation
4.1 Locating the Controller
Install the chemical pump and erosion feed systems as shown in manuals included with the
feeders. The controller may need to be set for the particular feeder system used. Before
installing the controller, it is important to do a site assessment to consider where and how you
will mount the unit. The controller should be mounted on a wall or other surface within eight
feet of the feeder, at least ten feet away from the edge of the water, and within six feet of the
GFCI power source. Never mount a controller above or near an acid tank. Never mount a
controller in a location accessible to the public. Install the controller in an area protected from
natural elements (sun, rain, freezing, etc.). See appendix for typical feed system schematics.
4.2 Mechanical Installation
Once the site is selected, obtain screws or anchors (mounting screws are not provided with
controller) to securely mount the controller on the wall or a panel. Install a screw in the
wall/panel where the top center of the controller is to be located. Leave ¼ inch of the screw
out of the wall to hang the controller from the keyhole located on controller’s back. Remove
the power panel access cover and install screws through the two holes located at the bottom
left and right corners of the controller.
Installed screw
Key hole
Wall
Controller with power panel access cover removed
Two screws mounted via the Power panel access
Do not remove front panel

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4.3 Power panel access
9. ORP1 FUSE
DATA pH
FUSE FUSE
ORP1
10. TERMINAL STRIP
11. pH FUSE
12. DATA PORT
13. FLOW SWITCH TERMINAL
15. DIP SWITCH ARRAY
16. DATA PORT & FLOW SWITCH INPUT
17. pH OUTPUT
18. ORP1 OUTPUT
20. EXTERNAL POWER INPUT
ON RS
1234
FUSE
ORP2
FLOW
19. ORP2 OUTPUT
21. ORP2 FUSE
20
191817
16
12
15 11 921
13
4.3.1 Dip switches
The controller has a series of dip switches to control functions that are not normally
accessible on the front panel. These dip switches are located inside the Power panel. To
access switches, remove power from the controller and remove power panel access cover.
There are four dip switches- #1 is the top switch. The switch is ‘off’ when in the left position
and ‘on’ in the right position. See appendix for settings.
4.3.2 Fuses
The ORP and pH are independently fused to protect the controller from defective feeders.
These fuses are located inside the lower panel. The fuse holders are shipped with 3.15 amp
fuses. Replacement fuses are 5mm x 20mm Fast Acting IEC.

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4.3.3 Flow Switch
The controller has a flow switch terminal located inside the Power Panel Access Cover on the
left side. It is shipped with a jumper in place. The terminal must either have the jumper or a
flow switch installed.
The flow switch light on the face of the controller is also a power light that shows that the
controller is connected to a live power source. If the terminal does not have a closed circuit,
the controller will not turn on.
NSF certification of this automated controller requires the use of a flow switch. To install a
flow switch, remove the jumper and install the flow switch leads. Note: with the flow switch
installed and the jumper removed, the flow light will no longer operate as a power light. It is
recommended the jumper be retained to assist in troubleshooting if necessary.
4.3.4 Globe Flowcell (see Globe Flowcell Operating Manual)
Connect the Globe Flowcell grounding stud to ground in order to prevent erroneous readings
and to prevent damage to the probes.
Note: It is recommended that an inline filter be used to help keep the flowcell (including
probes) and flow switch free from debris. Debris may cause obstruction in flow switch and
prevent the switch from functioning.

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5. Operation
5.1 Startup
Do not add chemicals to the feeders until all startup operations are completed. Using a DPD
test kit, manually adjust and balance the water chemistry to acceptable ranges. Automation
should be used to maintain chemical levels, not to balance a pool that is far out of
acceptable ranges. With the controller in the OFF mode, turn the filter pump on and check
for leaks in the system and flow through the flow cell. The flow lamp will be illuminated if the
controller has power, it is connected to the flow switch and there is adequate flow. If a flow
switch is not attached, the flow lamp will be illuminated if there is a jumper in the Flow
Switch Terminal allowing the controller to be used without a flow switch. Using a flow switch
is always recommended.
A properly installed and functioning flow switch will disconnect power to chemical feeders if
there is no water flow in the circulation plumbing. Test flow switch monthly by closing left-
hand valve on Flowcell and confirming that the flow light turns off. Then re-open valve and
confirm that light turns back on.
5.2 pH settings
Press and release the controller MODE button until the pH LED is lighted (refer to the
description of controls). Then select the desired Set Level, Feed Time, High and Low alert
levels. Adjust Consecutive Feed Alert Limit if Set Level is not met within preset limit as
indicated by the Digital Display flashing. –See appendix for detail.
Note: Controller can be set to feed acid or base. See Acid/Base pH chemical feed section
in Appendix for Dip switch settings. To verify that acid feed mode is selected adjust the pH
set level below the pH indicated on the display. The feed lamp should come on if the
controller is in acid feed mode. To verify that base mode is selected adjust the pH set level
above the pH indicated on the display. The feed lamp should come on if the controller is in
base feed mode.
5.3 pH Calibration
The pH sensor can drift slightly over time and calibration will offset this drift. Always calibrate
using water from the sample port of the flow cell and use an independent pH test method to
determine pH value of sample, unless using preset buffer solution. Press and release the
controller MODE button until the pH LED is lighted (refer to the description of controls). Then
use pH CALIB button to adjust reading to match known pH value of sample. It may take up
to 24 hours for the sensors to acclimate to the system so recalibrate 24 hours after the first
calibration. The pH sensor calibration should be checked every four to six weeks. If
calibration is required more often than probe may need cleaning or replacement.

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5.4 ORP settings
Press and release the controller MODE button until the ORP LED is lighted (refer to the
Description of Controls section). Then select the desired Set Level, Feed Time, High and
Low Alerts. Adjust Consecutive Feed Alert Limit if Set Level is not met within preset limit as
indicated by the Digital Display flashing. –See appendix for details.
The ORP display indicates the effectiveness of the sanitizer; it does not directly correlate to
a chlorine ppm reading. To determine your ORP set level, manually adjust and balance the
pool to be within acceptable ranges. Use a DPD test kit to confirm the free chlorine level.
Use the ORP reading of the balanced pool as your ORP set level.
5.5 Operating mode
Press and release the MODE button until the “AUTO” LED is lighted. This is the operational
mode for the controller. The controller must be in this mode for the feeders to maintain the
desired parameters.
Note: When using an automatic controller with ROLA-CHEM® pumps, the pump switch
should be in the CONTINUOUS position (not Timed or Off).
If the sanitizer level is too low or high, adjust the ORP set level up or down in small
increments, (for example 10mV to 25 mV increments) to lock in the desired sanitizer level.
Note: the ORP reading is highly dependent on both the pH and the cyanuric acid levels.
Both of these variables must be kept within acceptable ranges to maintain an acceptable
relationship between the ORP and the ppm of the sanitizer.
Note: Low feed rates can cause the feeder to lag or feeding to be extended. A high feed
rate can result in too much chemical being added.
If using time feed cycle, the feed lamp will flash during the feed time and be lit continuously
during the delay time of the feed cycle. If over feeding is occurring, consider using a shorter
feed cycle.
In Continuous feed, the feed lamp will flash while feeding.
When an alert lamp is on indicating readings below or above the alert settings the
pump/feeder will not activate. The Digital Display numbers will flash and the pump/feeder
will not activate if the Set Level is not reached within the preset Consecutive Feed Alert
Limit. See appendix for adjusting Limit.

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6. Troubleshooting
6.1 Chemicals not feeding
* FLOW light on Controller must be illuminated.
Check flow switch in Globe Flowcell if light is not on.
* Feeder power and time switches must be in ‘CONTINUOUS’ position.
Check feeder by using alternate power source.
* Factory setting for feed time is 0.6 sec on with 5-minute delay.
Feeders may require longer feed time.
* Chemical reading has met Set Level.
6.2 Displayed chemical level does not correspond to actual level
* ORP=0, pH=6.0 indicates sensors (probes) are attached to incorrect connector
* Sensors (probes) need cleaning. (see Globe Flowcell Operating Manual)
* Sensors (probes) need replacing.
Note: ORP probe reading can be affected by a failing pH probe.
Both probes must be in good operating condition.
* Connect Globe Flowcell ground stud to ground. (see Globe Flowcell Operating Manual)
6.3 Set Level not being reached/maintained
* Factory setting for feed time is 0.6 sec on with 5-minute delay. Feeders may require
longer feed time. If time is too short, set points will not be maintained. If feed time is too
long, overfeeding chemicals may occur. Correct time is dependent on multiple factors
such as pool/spa water volume, feeder output, chemical concentration and chemical
needs.
* Factory setting for Consecutive Feed Alert Limit is 40 cycles for timed feed mode or 40
minutes for continuous feed mode. If set level has not been reached within this adjustable
limit the Digital Display numbers will flash and pump/feeder will be disabled. If set level
cannot be met within this limit then higher limits may be required. See appendix for
adjusting Limit. If Limit is set too high, overfeeding chemicals may occur.
* Controllers are designed to maintain set-points. Do not expect controllers to make
major adjustments—major changes should be done manually.
* Pump/feeders must be large enough to reach desired set-points in a relatively
short time. Automation using controllers may require larger feeder or more
concentrated chemicals than system that uses continuous time controlled
feeding (i.e. feeders only).

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6.4 Error Code displayed
If an error code appears in the display the controller can be reset by following this
procedure.
A. Disconnect power to controller.
B. Simultaneously depress and hold FEED ONCE and pH CALIB buttons.
While they are depressed, reconnect power to controller.
The displays will read “Ld” on the left side and firmware version value on the
right side and then turn On.
C. Release the buttons.
D. The controller is now in test mode. Test mode reduces the feed delay time
from 5 minutes to 5 seconds to simplify diagnostics.
E. Turn the controller Off to exit test mode.
Press MODE to ORP or pH.
Hold MODE button until display reads “oFF”.
Release the MODE button. Only the flow light should be on.
F. Press MODE to turn the controller On and return to operating mode.
The last two steps are extremely important because this puts the controller back in
operating mode. If these two steps are not performed the controller will remain in
test mode and it will not operate properly.
If the error code continues to appear contact ROLA-CHEM® service personnel.
6.5 Digital Display numbers flashing
* Consecutive Feed Alert Limit has been reached. See appendix for Consecutive Feed
Alert Limit details.
* Adjust feed time as needed.
6.6 Alert light illuminated
* High/Low alert limit has been reached.
* Adjust feed time or alert settings as needed.
6.7 FEED ONCE button does not work
* FEED ONCE button will not operate if the feed time is set for “Continuous feed”.
* FEED ONCE button will not operate if controller is in auto Mode. Controller must be in
ORP or pH mode.
6.8 Globe Flowcell / Probe / Flow Switch troubleshooting
* See Globe Flowcell operating manual.

ROLA-CHEM® Digital Controller PN 554326 06/28/19 Page: 19 of 24
7. Warranty and Service
Limited Warranty:
ROLA-CHEM® warrants the original purchaser that this unit is free from manufacturing
defects in material and workmanship from the date of the original purchase for five (5) years.
If this unit fails within the five (5) year period it will be repaired or replaced (ROLA-CHEM®
option) at no charge when returned to ROLA-CHEM® with proof of purchase receipt. This
warranty does not apply to any product damage caused by improper use, accident, misuse,
improper line voltage, fire, flood, lightning, earthquake, other acts of nature, or if product was
altered or opened by anyone other than qualified ROLA-CHEM® personnel.
Effective date for this limited warranty – January 1st, 2019.
All expendable items (probes, flow switch, flow cell, valves, feeders, tubing, etc.) are not
covered under this warranty.
Heavy duty probes are warranted from the date of original purchase for one (1) year.
ROLA-CHEM® under no circumstances shall be liable for any consequential damages
directly or indirectly caused by this unit. Please observe all rules and regulations required by
state and local regulations, building codes, health codes, OSHA, etc.
Service Procedure: For operation assistance in the United States please call:
[phone] and ask for Customer Service, Monday through Friday 8:00 am-5:00 pm
Central Time or email: [e-mail]. Have model number and serial number
available.
ROLA-CHEM® has specialized knowledge and equipment to test and diagnose your
product. Contact our service personnel as noted above for assistance. If you are directed to
ship the product to ROLA-CHEM® and given an RGA#, please note RGA# on the package
and ship freight pre-paid to:
ROLA-CHEM®
5858 Centerville Road
St. Paul, MN 55127-6804
www.rola-chem.com

ROLA-CHEM® Digital Controller PN 554326 06/28/19 Page: 20 of 24
8. Appendix
8.1 Dip switch settings
The controller has dip switches to control functions/options that are not accessible on the front panel. These
dip switches are located inside the power panel access cover. Slide switch right for ON or left for OFF. See
section 4.3.
Switch #1 OPR/pH interlock
#1 OFF - ORP chemical feeding is independent of pH feeding and range.
#1 ON factory setting - ORP chemical feeds only when pH is within set limits. ORP chemical will not feed when pH
chemical is feeding.
Switch #2 Consecutive Feed Alert Limit
Setting consecutive feed alert limit to OFF voids NSF certification. If limit is set too high, overfeeding may
occur.
Timed feed Mode (Feed time set to a value other than “con” or “off” on Controller front panel)
#2 OFF – There is no consecutive feed limit.
#2 ON factory setting – The pH and ORP chemical feeder outputs go through a preset number of consecutive feed
cycles before feeders are disabled. If preset count is reached for either pH or ORP, the respective feeder outputs
will be disabled and its display will flash indicating a Consecutive Feed Alert.
The Consecutive Feed Alert cycle limit can be set from 20 to 100 (default is 40) or “OFF” and can be
independently set for both pH and ORP. The available range and default value on older controllers may vary.
To adjust the Consecutive Feed Alert Limit feature in the 'timed feed mode'
1) Turn off & remove power, then move #2 dip switch to ON.
2) Re-power & press MODE to set it for ORP or pH.
3) Note feed time setting then Set FEED TIME to OFF.
4) Press FEED ONCE button to select the consecutive feed cycle limit.
5) Press FEED TIME to return the feed time to the previous setting.
Continuous feed Mode (Feed time set to “con” on Controller front panel)
#2 OFF – There is no consecutive feed limit.
#2 ON factory setting - The pH and ORP chemical feeder outputs continuously feed for a preset time before
feeders are disabled. If the preset time period is reached for either pH or ORP, the respective feeder output will
be disabled and its display will flash indicating a Consecutive Feed Alert.
The Consecutive Feed Alert Limit period can be set from 20 to 180 minutes or “off” (default is 40) and can be
independently set for both pH and ORP. The available range and default value on older controllers may vary.
To adjust the Consecutive Feed Alert Limit feature in the 'Continuous feed mode'
1) Turn off & remove power, then move #2 dip switch to ON.
2) Re-power & press MODE to set it for ORP or pH.
3) Set FEED TIME to ‘con’.
4) Press FEED ONCE button to select the continuous feed time limit.
Switch #3 Acid/Base pH chemical feed
#3 OFF factory setting – Unit set to feed acid chemical when pH is over set level.
#3 ON – Unit set to feed base chemical when pH is under set level.
Switch #4 – no function on this controller.