Troubleshooting - Crown Boiler PHNTM120 Installation And Operation Instructions Manual

‡ ([SORVLRQ +D]DUG (OHFWULFDO 6KRFN +D]DUG %XUQ +D]DUG 7KLV ERLOHU XVHV ÀDPPDEOH JDV KLJK
YROWDJH HOHFWULFLW\ PRYLQJ SDUWV DQG YHU\ KRW ZDWHU XQGHU KLJK SUHVVXUH $VVXUH WKDW DOO JDV
DQG HOHFWULF SRZHU VXSSOLHV DUH RII DQG WKDW WKH ZDWHU WHPSHUDWXUH LV FRRO EHIRUH DWWHPSWLQJ DQ\
GLVDVVHPEO\ RU VHUYLFH
‡ 'R QRW DWWHPSW DQ\ VHUYLFH ZRUN LI JDV LV SUHVHQW LQ WKH DLU LQ WKH YLFLQLW\ RI WKH ERLOHU 1HYHU PRGLI\
UHPRYH RU WDPSHU ZLWK DQ\ FRQWURO GHYLFH
‡ 7KLV ERLOHU PXVW RQO\ EH VHUYLFHG DQG UHSDLUHG E\ VNLOOHG DQG H[SHULHQFHG VHUYLFH WHFKQLFLDQV
‡ ,I DQ\ FRQWUROV DUH UHSODFHG WKH\ PXVW EH UHSODFHG ZLWK LGHQWLFDO PRGHOV
‡ 5HDG XQGHUVWDQG DQG IROORZ DOO WKH LQVWUXFWLRQV DQG ZDUQLQJV FRQWDLQHG LQ DOO WKH VHFWLRQV RI WKLV
PDQXDO
‡ ,I DQ\ HOHFWULFDO ZLUHV DUH GLVFRQQHFWHG GXULQJ VHUYLFH FOHDUO\ ODEHO WKH ZLUHV DQG DVVXUH WKDW WKH
ZLUHV DUH UHFRQQHFWHG SURSHUO\
‡ 1HYHU MXPS RXW RU E\SDVV DQ\ VDIHW\ RU RSHUDWLQJ FRQWURO RU FRPSRQHQW RI WKLV ERLOHU
‡ 5HDG XQGHUVWDQG DQG IROORZ DOO WKH LQVWUXFWLRQV DQG ZDUQLQJV FRQWDLQHG LQ $// RI WKH FRPSRQHQW
LQVWUXFWLRQ PDQXDOV
‡ $VVXUH WKDW DOO VDIHW\ DQG RSHUDWLQJ FRQWUROV DQG FRPSRQHQWV DUH RSHUDWLQJ SURSHUO\ EHIRUH SODFLQJ
WKH ERLOHU EDFN LQ VHUYLFH
The following pages contain trouble shooting tables for use in diagnosing control problems. When using these tables
the following should be kept in mind:
1) This information is only meant to be used by a professional heating technician as an aid in diagnosing boiler
problems.
2) Where applicable, follow all precautions outlined in the Section XI (Start-up and Checkout).
3) All controls on the boiler are tested at least once in the manufacturing process and a defective control or
component is generally the least likely cause. Before replacing a component, try to rule out all other possible causes.
The plain text display provided with this boiler provides an easy means of identifying most common problems. In the event that
the control system detects a problem, such as an open limit or defective sensor, the Active Fault button shown in Figure 14.0 will
DSSHDU DQG ÀDVK RQ ERWK WKH +RPH 6FUHHQ DQG WKH %XUQHU 6WDWXV 6FUHHQ 7RXFKLQJ HLWKHU $FWLYH )DXOW EXWWRQ ZLOO WDNH WKH XVHU WR
WKH 'LDJQRVWLFV 0HQX )URP KHUH SUHVV WKH ÀDVKLQJ EXWWRQ RQ HDFK VXFFHVVLYH VFUHHQ WR UHDFK D OLVW RI SRVVLEOH FDXVHV ,Q WKH FDVH
of a defective temperature sensor, a defect indicator will also show up on the status screens where the corresponding temperature
is normally displayed. See Figure 14.0 for an example of this.
The complete Diagnostics Menu is shown in Figure 12.7. The screens on this menu provide the following information:
1) For Service Contact - Displays the service contact information entered in Section XII, Step D.
2) About - Displays the software versions for both the boiler control (R7910B) and the display
3) Fault Menu - Provides status of different types of faults by category. When a particular fault exists, the button for that
FDWHJRU\ RI IDXOWV ZLOO ÀDVK VHH )LJXUH  IRU DQ H[DPSOH RI D IDXOW\ VXSSO\ VHQVRU  ,Q WKH H[DPSOH VKRZQ LQ )LJXUH
 ERWK WKH 6HQVRU DQG 6RIW /RFNRXW EXWWRQV ÀDVK RQ WKH )DXOW 0HQX EHFDXVH D GHIHFWLYH VXSSO\ VHQVRU DOVR FDXVHV D VRIW
lockout. Fault categories include:
XIV. Troubleshooting
'$1*(5
:$51,1*
A. Using the Diagnostics Menu
113