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Troubleshooting Guide
PLEASE NOTE: All installations are made in accordance with the local plumbing and electrical codes applicable in your area. Local codes in New Zealand require all plumbing work to be performed by a registered plumber and all electrical work to be performed by a registered electrician.
| Problem |
Possible cause |
Corrective action |
| Low hot water flow |
(1) 'Water Saver' shower roses;
(2) ‘Flick’ mixers or 1/4 Turn ceramic disc taps
(3) Restricted or blocked strainers on tap outlets.
(4) HFK pump is switched off. |
Remove restriction disks from showerhead or replace with non-restrictive showerhead.
(2) This type of tap ware reduces hot water flow.
(3) Remove strainer, remove restriction disk and/or clean strainer mesh.
(4) Turn the switch (on the black electrical box of the pump) to the ON position (the “2 AUTO” position see P8) |
| No hot water flow |
(1) Cold water supply valve closed
(2) Float valve malfunction.
(3) Air trapped in hot water pipe |
(1) Open valve.
(2) Repair/Replace float valve
(3) Fully bleed hot pipe to ensure that all air is expelled. |
| Pulsing hot water flow |
(1) Float valve position is incorrectly set.
(2) Pressure switch on cold water supply pump is set incorrectly. |
(1) Reset float arm to provide water level 25mm below the overflow level.
(2) Reset pressure switch. |
| Delay in flow when opening hot tap |
(1) Worn ‘dome’ type tap washer sticking in tap body.
(2) Air trapped in hot water pipe. |
(1) Replace washer with non-dome type.
(2) Fully bleed hot pipe to ensure that all air is expelled. |
| Hot water temperature too low |
(1) Low solar gain.
(2) Electric booster operation.
(3) Excessive hot water usage.
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(1) Low solar radiation due to cloud.
(2) Shading of collector panels for all or part of the day.
(3) Check for hot water leakage within the plumbing system.
(1) Turn on booster switch/time switch.
(2) Replace booster fuse.
(3) Call your electrician to set thermostat to higher setting.
(1) Reduce usage.
(2) Install a further unit.
(3) Check for hot water leakage within the plumbing system of the house. |
| Hot water temperature too high |
(1) Electric booster operation. |
(1) Call your electrician to set thermostat to lower setting. |
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