%3*45&&. 7BQPSMPHJD *OTUBMMBUJPO BOE 0QFSBUJPO .BOVBM t 1BHF
Operation
Tr o u b l e s h o o t i n g g u i d e
Table 81-1:
Troubleshooting guide (continued)
Heat
ing
i
ssue
s
Issue
Possible causes
Actions
Alarm:
Tank temperature sensor failed
t 0QFOTIPSUFEPSJODPSSFDUXJSJOHPGTFOTPS
t $IFDLXJSJOHUFSNJOBMTGPSDPSSFDUXJSJOHBOEWPMUBHFT
1000 Ohms = 68 °F (20 °C); 1702 Ohms = 212 °F (100 °C).
t )VNJEJGJFSJOUFSMPDLTXJUDIFTBOEPSPWFS
temperature thermostat
t 7FSJGZUIBUTXJUDIPSUIFSNPTUBUJTXJSFE
t 7FSJGZJOUFSMPDLTXJUDIJTTFUDPSSFDUMZBOEIVNJEJGJFSDPWFSJTPO
t 3FTFUPWFSUFNQFSBUVSFUIFSNPTUBUJGUSJQQFE
Alarm:
Tank overtemp
t 6OJUIBTPWFSIFBUFEUFNQFSBUVSFJTBU'
(14 ºC) over boiling temperature
t $IFDLGPSQSPQFSXBUFSMFWFMJOUBOL
t 'BVMUZTFOTPS
t 3FQMBDFTFOTPS
Reduced or no output (even
though water level is correct)
Electric units:
t )FBUFSNBMGVODUJPOJOH
t 7FSJGZUIBUQSPQFSWPMUBHFJTCFJOHBQQMJFEUPIFBUFST
t 7FSJGZIFBUFSBNQFSBHFNBUDIFTXJSJOHEJBHSBN
t *GIFBUFSDPOUBDUPSJTOPUGVODUJPOJOHSFQMBDF
Electric units:
t .BMGVODUJPOJOHDPOUSPMTZTUFN
t $IFDLJGIFBUFSGVTFTBSFCMPXOBOESFQMBDFJGSFRVJSFE
t $IFDLJGBVYJMJBSZMJNJUDPOUSPMTBSFOPUBMMPXJOHTZTUFNUP
operate, e.g., duct humidistats, airflow proving switch, etc. Reset,
replace or calibrate as needed. (Airflow switch, terminal P13
(24VAC and AFsw) measures 24 VAC if open. On-off high limit,
terminals P13 (24VDC and DHL), measures 24 VDC if open.
t $IFDLJGUIFIFBUFSPWFSUFNQFSBUVSFUIFSNPTUBUIBTUSJQQFE
Reset if necessary.
GTS, STS or LTS units:
t %JSUZIFBUFYDIBOHFS
t $MFBO
GTS units:
t %JSUZCVSOFST
t -PXHBTQSFTTVSF
t $MFBOPSBEKVTUBTBQQSPQSJBUF4FFUBOLNBOVBMGPSJOTUSVDUJPOT
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