47
Page
240 (T-H3J), 340 (T-H3S) and 540 (T-H3) models Service Manial
Ver. 1.00
CONFIDENTIAL
11. Fault Analysis & Specifications
Remarks:
ϭ͘WƌŽƉĞƌƌĂŶŐĞŽĨǀĂůƵĞƐŽĨǀŽůƚĂŐĞΘƌĞƐŝƐƚĂŶĐĞƐŚŽǁŶďĞůŽǁ͘
Ϯ͘WůĞĂƐĞƌĞĨĞƌƚŽƚŚĞǁŝƌŝŶŐĚŝĂŐƌĂŵĨŽƌĐŚĞĐŬƉŽŝŶƚƉŽƐŝƚŝŽŶƐ͘
ϯ͘ZĞŵŽǀĞƉŽǁĞƌƚŽƚŚĞǁĂƚĞƌŚĞĂƚĞƌǁŚĞŶĐŚĞĐŬŝŶŐĨŽƌĐŽŶƚŝŶƵŝƚLJ͕ĚŝƐĐŽŶŶĞĐƚŝŽŶƐ͕ƌĞƐŝƐƚĂŶĐĞǀĂůƵĞƐ͕ĞƚĐ͘
Natural of Fault
Diagnosis
Check
point
ͻEŽĚŝƐƉůĂLJŽŶƚŚĞ
controller, even when
remote is turned on.
1 Check the power supply
ϭŚĞĐŬƚŚĞƉŽǁĞƌƐƵƉƉůLJĨƌŽŵWŽǁĞƌKEͲK&&ƐǁŝƚĐŚƚŽƚŚĞW
(Refer to section 12-2)
[2] Check the power supply line to the water heater
Ϯ&ĂƵůƚŽĨWŽǁĞƌKEͲK&&ƐǁŝƚĐŚ
Normal: 120 VAC between (white-black)
Normal: 120 VAC between (white-black)
A
A1
ϯůŽǁŶĨƵƐĞĂƚƐƵƌŐĞďŽdž;ϱͿ
A2
ϰ&ĂƵůƚŽĨW
[1] No voltage at the controller
Normal: 11 to 25 VDC between (white-black)
F
>
ϱŝƐĐŽŶŶĞĐƚŝŽŶͬƐŚŽƌƚͲĐŝƌĐƵŝƚͬŐƌŽƵŶĚŝŶŐŽĨƚŚĞĐŽŶƚƌŽůůĞƌǁŝƌĞƐ
Normal: 11 to 25 VDC between (white-black)
ϲ&ĂƵůƚŽĨWŽĨƚŚĞĐŽŶƚƌŽůůĞƌ
ϭŚĞĐŬĨŽƌŶŽƌŵĂůǀŽůƚĂŐĞĂƚƚĞƌŵŝŶĂů
ͻ/ƚƚĂŬĞƐůŽŶŐƚŝŵĞƚŽ
get hot water at the
ĨŝdžƚƵƌĞƐ
ϭdŚĞƚŝŵĞŝƚƚĂŬĞƐƚŽĚĞůŝǀĞƌŚŽƚǁĂƚĞƌĨƌŽŵƚŚĞǁĂƚĞƌŚĞĂƚĞƌƚŽ
ĨŝdžƚƵƌĞƐĚĞƉĞŶĚƐŽŶƚŚĞůĞŶŐƚŚŽĨƉŝƉŝŶŐďĞƚǁĞĞŶƚŚĞŵ͘dŚĞůŽŶŐĞƌ
the distance or the bigger the pipes, the longer it will take to get hot
water.
Ϯ/ĨLJŽƵŶĞĞĚŚŽƚǁĂƚĞƌƚŽĨŝdžƚƵƌĞƐƋƵŝĐŬĞƌ͕LJŽƵŵĂLJǁĂŶƚƚŽĐŽŶƐŝĚĞƌ
a hot water recirculation system.
ͻdŚĞǁĂƚĞƌŝƐŶŽƚŚŽƚ
enough
1 Check cross pluming between cold water lines and hot water lines.
2 Check whether the gas supply pressure is enough.
3 Check whether the temperature setting is too low.
ͻdŚĞǁĂƚĞƌŝƐƚŽŽŚŽƚ
1 Check whether the temperature setting is too high.
ͻdŚĞŚŽƚǁĂƚĞƌŝƐ
not available when a
ĨŝdžƚƵƌĞŝƐŽƉĞŶĞĚ
ϭDĂŬĞƐƵƌĞƚŚĞƵŶŝƚŚĂƐĂϭϮϬsͬϲϬ,njƉŽǁĞƌƐƵƉƉůLJ͘
Ϯ/ĨƚŚĞƌĞŵŽƚĞĐŽŶƚƌŽůůĞƌŝƐƵƐĞĚ͕ĐŚĞĐŬǁŚĞƚŚĞƌƚŚĞƉŽǁĞƌďƵƚƚŽŶŝƐ
turned on.
ϯŚĞĐŬƚŚĂƚƚŚĞĨŝůƚĞƌŽŶƚŚĞĐŽůĚǁĂƚĞƌŝŶůĞƚŝƐĐůĞĂŶ͘
ϰŚĞĐŬǁŚĞƚŚĞƌƚŚĞŚŽƚǁĂƚĞƌĨŝdžƚƵƌĞŝƐƐƵĨĨŝĐŝĞŶƚůLJŽƉĞŶƚŽĚƌĂǁĂƚ
least 0.5 GM through the water heater.
ϱŚĞĐŬǁŚĞƚŚĞƌŽƌŶŽƚƚŚĞƵŶŝƚŝƐĨƌŽnjĞŶ͘
ϲŚĞĐŬŝĨƚŚĞƌĞŝƐĞŶŽƵŐŚŐĂƐŝŶƚŚĞƚĂŶŬ͘;ĨŽƌƉƌŽƉĂŶĞƵŶŝƚƐͿ
