Zurn Z6950-XL Serio Series Troubleshooting Guide
Adjustable modes and features selection:
To adjust features from default configuration, you must remove the battery tray. Once battery tray is removed you will see the switches.
Purge Features:
The purge switches can be configured for 4 modes of operation: Disabled (standard configuration), 12 hour, 24 hours, or 48 hours. Purge water flow duration is 2 minutes. Note: Purge activation occurs every switch selected time (0,12, 24, or 48 hours) after last activation.
Flow Time:
There are 6 optional time configurations: 30 seconds (standard), 5s, 10s, 15s, 60s, & “Less Time-out”. The “Less Time-out” option actually ceases water flow (turns off) after 20 minutes to limit chance of water damage in the event a sink drain becomes blocked .
Sensing Mode (DEFAULT):
During this mode the valve will shut off after hands are removed. If hands are not removed the time out delay will turn off the faucet (ex: standard configuration is 30 seconds)) (See Sensing & Metering Mode flow chart above page)
Metering Mode:
When hands are detected by the sensor, water will run for ‘ X’ seconds (standard configuration is 30 seconds) before turning off. (See Sensing & Metering Mode flow chart on following page)
Sensor Sensitivity: (Default setting: Low):
There are 4 sensitivity options, which can be selected to achieve the optimal detection performance related to the sink material, shape, & finish. The faucet sensor sensitivity is configured during pack-out but the mode can be changed upon installation to
optimize the performance within the sink. Sensor sensitivity and sensor detection Modes A & B may be tried for various lighting conditions, sink materials and shape.
Switch 7 controls the sensitivity
-On (default) is normal sensitivity for most sinks providing max range.
-Off set the sensor to a lower sensitivity level for sinks that cause false activation. The detection range maybe less for all hands. Switch 8 controls sensor mode
-On (default) enables the mode that filters the effects of flowing in the bottom of problematic sinks. Detection maybe less for some hands.
-off disable the filter mode, so detection is expanded deeper into the sink for max detection range for all hands. Some sinks may only be able to operate in this mode.
NOTE: After a configuration switch change has been made. Disconnect sensor cable from electronics box, wait 30 seconds, then reconnect sensor cable and wait 30 additional seconds to allow the sensor to tune-in the sink characteristics. Calibration includes characterizing the sink with water running into the bowl. This could be 5 to 60 seconds depending on configuration.
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| Water is not getting cold |
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| Problem | Cause | Corrective Action |
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| Compressor is warm or hot & fan will not shut off |
- Relay connection to compressor is loose
- Relay is defective
- Refrigerant charge problem
- Condenser fins in front of the fan are covered with debris
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- Push relay onto compressor
- Replace relay
- Contact service agent
- Remove debris with compressed air or vacuum (may have caused overload, relay or compressor defect)
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- 55
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- 66
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| Compressor is room temperature. Fan runs continuously |
- Possible open overload or relay
- Possible defective compressor
- Condenser fins in front of the fan are covered with debris
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- Replace overload and relay
- Compressor needs to be replaced, contact service agent
- Remove debris with compressed air or vacuum (may have caused overload, relay, or compressor defect)
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| Compressor is room temperature & fan will not run. |
- Power lost to outlet
- Open cold control
- Wire terminal not plugged into cold control
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- Restore power to outlet
- Replace cold control
- Locate correct terminal & plug into cold control
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| Compressor or inside of water cooler is hot. Fan is not running |
- Fan is blocked by a tube
- Fan is defective
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- Remove tube from fan
- Replace fan
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| Compressor is making a loud knocking or grinding noise |
- Compressor is defective
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- Compressor needs to be replaced. Contact service agent
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| Water runs out of bubbler continuously |
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| Problem | Cause | Corrective Action |
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| Water cooler is an EZ, HTV, or electric eye series water cooler and water runs even when the power cord is not plugged in |
- Solenoid or solenoid diaphragm is defective
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- Replace solenoid. (To verify: while water is running, unplug the power cord. If the flow does not stop immediately, replace the solenoid)
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| Water cooler is an EZ, HTV series water cooler and water stops immediately every time when you unplug the power cord from the outlet |
- Press bar is sticking & holding micro-switch down
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- Replace push bar, or repair the cause of the sticking press bar - such as the basin hanging on the mounting bracket for EZ model, or the press bar screw too tight on the HTV model
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| Water cooler is an EHF, WC, HAC, or EMABF series water cooler |
- Press bar adjustment screw has not been adjusted properly
- Regulator is not stopping the water
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- Refer to manual & adjust press bar screw clockwise until flow stops
- Replace regulator, could be caused by sand or similar residue - consider adding filter
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| Water cooler or fountain model other than previous listed |
- Regulator is not stopping the water
|
- Replace regulator, could be caused by sand or similar residue - consider adding filter
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| Water won't flow intermittently |
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| Problem | Cause | Corrective Action |
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| Water cooler was manufactured prior to 2001 & water is very cold |
- Sensing wire on the cold control has vibrated out of the bulbwell partially
- Cold control is out of calibration
- Bulbwell has detached from the evaporator coils
- Condenser fins in front of the fan are covered with debris
|
- Push sensing wire down in the bulbwell
- Replace cold control
- Evaporator needs to be replaced - contact service agent
- Remove debris with compressed air or vacuum (may have caused overload, relay, or compression defect)
|
| Water quality problem (taste or odor) |
|---|
| Problem | Cause | Corrective Action |
|---|
| Water has a taste or odor problem |
- Install used plumbers putty or other sealant when connecting water supply
- Installer used a commercial grade stainless steel braided flex line to connect water supply to water cooler
- Water has bacteria or sulfur content
|
- Remove sealant & use Teflon tape or compression fitting
- Remove stainless steel braided flex line & replace with appropriate supply line
- Contact your local water department & have water tested & add appropriate filter. Water cooler may need to be flushed with food grade sanitizer
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| Water stream is too low |
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| Problem | Cause | Corrective Action |
|---|
| Stream is too low after initial installation of the product |
- Water pressure is lower than factor test conditions
- Press bar adjustment screw has not been adjusted for EHF, WC, HAC, or EMABF series water coolers
- Solenoid will not open up all the way on EZ, HTV, or electronic eye models
- Strainer screen is plugged with debris
- Water cooler has an added filter that is restricted
|
- Remove sealant & use Teflon tape or compression fitting
- Refer to manual and adjust press bar adjustment screw
- Replace solenoid
- Clean or replace strainer screen
- Replace filter
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| Water stream is too high |
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| Problem | Cause | Corrective Action |
|---|
| Water stream is too high |
- Water pressure is higher than factory test conditions
- Shut off valve is not open all the way causing a back pressure
- Bubbler or orifice is partially restricted with mineral deposits, causing back pressure (similar to placing your thumb partially over the end of a garden hose)
|
- Refer to manual & adjust regulator screw counter clockwise to desired height
- Open shut off valve all of the way
- Clean or replace bubbler or orifice
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| No Water Flow |
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| Problem | Cause | Corrective Action |
|---|
| Water cooler is an EZ, HTV, or electric eye operated model |
- No power to outlet
- Wire disconnected from solenoid
- Power cord to water cooler is open (compressor & fan will not run)
- Water shut off valve not open
- Regulator valve defective
- Kinked water line internally
- Water is freezing up in the evaporator
|
- Restore power to outlet
- Find correct wire & replace on to solenoid
- Replace power cord
- Open shut off valve
- Replace regulator
- Locate affected line & remove kink
- Refer to freeze up section of "water won't flow intermittently"
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| No water flow on all other water coolers/fountains |
- Water shut off valve not open
- Regulator valve defective
- Kinked water line internally
- Strainer screen is plugged with debris
- Water is freezing up in evaporator
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- Open shut off valve
- Replace regulator
- Locate affected line & remove screen
- Clean or replace strainer screen
- Refer to freeze up section of "Water won't flow intermittently"
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